Aggression (during monitoring, mating season, etc.)
Also see Monitoring, Bluebird Behavior and Tree Swallows
From: "jodyrose" jodyrose"at"bright.net
Subject: Re: vaccine for Lyme's Disease - Fighting male EABL's
Date: Mon, 22 Apr 2002 19:50:51 -0400
...
I witnessed something Saturday I had not seen before. 2 males were fighting at the edge of the yard. They would clash then fall to the ground and roll around. There was a female that would hover above them, then fly a little way away, then return. There were also several tree swallows swooping down and chattering, like they wanted them to stop. Has anyone ever witnessed 2 males fighting before. Do you supposed they were fighting over the female? Would they fight to the death? I think one of them finally flew away.
Love this list!!
Jodyrose Mt. Gilead, Ohio (60 miles north of Columbus)
Date: Mon, 5 May 2003 07:33:18 -0400 (EDT)
From: Bob Falcon bobfalcon"at"mindspring.com
Subject: Bluebird w/nasty attitude towards monitor
This is my first year bluebirding (backyard), and I believe I have a pair with a nasty attitude. Let me know if my birds sound "normal" to you.
I have BBs in my Peterson box in my backyard, which is paired with a BB Supergourd on a shephard's hook 15' away for my TS. Prior to egg laying, my BBs wouldn't let me get anywhere near them, and they would fly away as soon as I got within 40' or so. Egg laying began last week, and that's when they got nasty. When I monitor the nest to count eggs (5 as of yesterday), I get the ole "slow motion" dive bomb from either mom or dad to be. I did not read anything in the Bluebird Monitor book about monitors being divebombed at this early stage. I'm not touching the eggs, but using a mechanics mirror to check. (Last year, my TS dive bombed me, but that was when I was doing nest checks "after" the eggs had hatched.)
To analogize, my TS are like dogs...very friendly, hyperactive, but interactive. My BBs act like cats...sneaky, snobby, and now they have this attitude. So tell me, do I have a pair of "strange birds"?
Bob Falcon
Thornton, PA (20 mi SW of Philadelphia
From: "emcooper" emcooper"at"bayou.com
Subject: Re: Bluebird w/nasty attitude towards monitor
Date: Mon, 5 May 2003 06:50:26 -0500
No, you do not have a pair of strange birds. At two of my sites, I have some that are very protective. I really get a kick out of them dive-bombing me. This the first time I have ever seen the male dive-bomb too and it must not be uncommon if you say you are seeing it too. I feel like that the ones that stay all winter and come to eat at the feeder at the ones that are used to me and don't dive-bomb me. That is just a guess. Rest assured that your pair would dive-bomb anything they perceive as a threat and be glad!
Evelyn Cooper
Delhi, La.
Louisiana Bayou Bluebird Society...
From: hubertrap"at"webtv.net (Joe Huber)
Date: Mon, 5 May 2003 08:32:24 -0400 (EDT)
Subject: Re: Bluebird w/nasty attitude towards monitor
Hi Bob, The actions of your Bluebirds is probably from a past experience they have had. They want to start early protection because of some past bad experience. The normal way Bluebirds respond is by dive bombing you, with one Bluebird diving at you while the other follows up the same way giving you the feeling there is always one coming at you as they follow each other in a continuous pattern in a circle formation. this pattern is usually more noticed closer to fledging time. It's actually good these bluebirds are more aggressive than most. Don't take it personal as they are doing what comes natural. I once took photos every second day of nest progress using a top opening box. During the last days at 16 and 18 days in the nest the parents started diving very violently at me, but i finished photos before closing the box. Don't worry they won't hurt you its all bluff. Joe Huber Venice, Fl.
Charter member NABS, Charter member OBS, Life member OBS Joe Huber ...
From: dmccue5060"at"aol.com
Date: Tue, 6 May 2003 21:54:32 EDT
Subject: Re: Bluebird w/nasty attitude towards monitor
Bob - Very normal BUT in my 10 odd years of monitoring 154 boxes a couple of times per month, I have as yet NEVER have they touched me, I feel the wind from their wings but that is all. Most just set on the wires above and watch me till I finish monitoring then fly back to the nest, etc. They eventually will get use to you. God bless,
Dan McCue, 70 miles due west of Nashville in West TN.
From: Paula [mailto:PaulaZ"at"columbus.rr.com]
Sent: Thursday, May 20, 2004 8:13 AM
Subject: Re: Fight
Barbara,
I imagine you have western blues where you live? I think their territory is a little bigger than the eastern blues. If it were me, I would go to a neighbor a little over 300 feet from my house and ask if I could make a gift of a box for them (if they are interested). I would explain monitoring, etc. and offer to control HOSP for them if you have them (we do). I would mount it for them or tell them where to put it. If you can keep it totally out of line of sight of your box, this is best. I have done this with two of my neighbors at strategic locations. It is funny because in the last week, three others have asked me where they can put a box. If these other neighbors do put up a box (closer than 300 feet to mine), I might not get my EABL, but that is fine with me - I want them to be safe nesting and all my neighbors use me as a resource in that regard. It sounds to me like a lone male came to try to take the female of your pair. Dad fought him off I believe. The new box will be successful if the lone male can attract a mate. Paula Z Powell (Central) Ohio
From: Kerry Sweet [mailto:ksweet3450"at"yahoo.com]
Sent: Monday, June 07, 2004 12:33 PM
Subject: Trail vs Backyard Bluebirds
Evelyn says " You can sure learn much more from your backyard blues!" I have observed the differences in the Eastern Bluebirds (EABL) in my yard as opposed to the ones in the pasture on the trail. The EABL in my yard have a nest of fine grasses from the mowed yard and they sit in the tree watching while I look in the nestbox sometimes they chatter alittle at me but thats all. Then a pair of EABL in the pasture ... well I almost removed their nest due to the weeds and texture of the nesting material, it looked almost like a house sparrow (HOSP) at first glance, not being sure I left it and it turned out to be an EABL nest ... the nest was high from the bulky nesting material so I removed some of the nest from the bottom ... the parents, unlike the backyard EABL, would gang up and dive bomb me ... it's a wonder I still have hair left on my head. A couple of years back I fed the backyard EABL mealworms and they would come with a whistle eating every last mealworm ... and I remember trying to feed mealworms to the EABL on the trail and one pair finally ate them but were very cautious and another pair would never even touch them. The EABL on the trail seems alot more wild than the backyard EABL. Kerry in NE corner of Okla.
From: judymellin [mailto:judymellin"at"netzero.net]
Sent: Monday, June 07, 2004 7:31 PM
Re: Trail vs Backyard Bluebirds
Hi Kerry- I think you have very well summarized what so many of us feel! In my opinion, the "trail birds" are in a much more natural environment and are using their inbred skills to find nest cavities and food and to teach the fledglings these same skills. I would hate to see bluebirds go the way of purple martins and become completely dependent on humans. Great observations since you have boxes in a variety of habitats! Judy Mellin NE IL.
From: Evelyn Cooper [mailto:emcooper"at"bayou.com]
Sent: Monday, June 07, 2004 7:37 PM
RE: Trail vs Backyard Bluebirds
Well, I hate to burst anyone's bubble, but the pair in my backyard were about the most aggressive little rascals you ever saw. They dive-bomed me on every visit. This happened on the first cycle too. In fact, the male dive-bombed me over an empty nestbox he has fallen in love with in the front yard. That really tickled me! In fact, I think they are dominating the yard. I love it!!! Evelyn Cooper Delhi, LA
From: Bruce Burdett [mailto:blueburd"at"tds.net]
Sent: Tuesday, June 08, 2004 8:46 AM
Re: Inconsistencies
To the Conststuency: One thing we seem to be learning from the testimony on this List is that behavior in the various bird species, - including the Bluebird, - varies widely from individual to individual. Some Bluebirds are highly aggressive and defensive; some are more passive and easier to push around. I have never been dive-bombed by a Bluebird, yet some folks report it routinely. Tree Swallows swoop at my head and curse at me as a matter of course, though none has ever actually touched me. More often than not, I see Bluebirds sitting on a neighboring Tree Swallow house and peering in at the nest, though they never harm or even harrass (sp?) them. Once the Tree Swallows start their nest, they largely ignore the Bluebirds and go about their business. They seem to regard the Bluebirds as friends and allies, and not as threats. However, a single (un-paired) Bluebird house is almost always taken over by Tree Swallows, at least here where I am. They don't actually attack the Bluebirds physically, they just harrass them out of the neighborhood by swooping at them in droves, even if the Bluebirds have built a nest and produced eggs. So............these things seem to vary with the part of the country and the various personalities of your local birds. Bruce Burdett
From: Evelyn Cooper [mailto:emcooper"at"bayou.com]
Sent: Tuesday, June 08, 2004 9:19 AM
RE: Inconsistencies
Bruce, when I first joined BB-List and for several years, there seemed to be more posts about Bluebirds being passive. Seldom did we read about aggression. In fact, some called them wimps. It makes me happy to read about them showing aggressiveness and defending their territory and babies. I actually witnessed one male Bluebird fighting off four House Sparrows at my granddaughter's home in early spring. He was defending the nestbox that his mate was incubating and also a nestbox that was paired with it. So anytime I read about Bluebirds being aggressive, it makes me smile! Evelyn Cooper Delhi, LA
From: Evelyn Cooper [mailto:emcooper"at"bayou.com]
Sent: Sunday, January 09, 2005 11:06 AM
Subject: Bluebirds Are Fighting
It is one beautiful sunshiny day here and evidently, the Bluebirds hormones are working overtime. I have watched two males and a female on the backyard nestbox. Wing waving has been going on all morning and I have been adoring them. However, as of the last 30 minutes, the two males are fighting like I have never seen before. They are rolling on the ground and I just knew one had killed the other. I want to go out and break it up, but I don’t know if I should interfere with Mother Nature. Sometimes, all three of them are in the mix. The female jumps in sometimes too. Oh, this is just too much! I gotta get back and see if they all survive it!! Evelyn
From: JOHN & BARBARA SIBIO [mailto:jsibio"at"comcast.net]
Sent: Sunday, January 09, 2005 11:50 AM
Re: Bluebirds Are Fighting
Evelyn, I watched the same battle last summer when my "pair" was split up by a very handsome young male after raising two broods. He fought the older male, took him to the ground and rolled around in the dirt with him! He and the female built the third nest together and raised their own brood. The lonesome ex-male hung around for a while, and was looking pretty pathetic. It's hard to watch when you have formed an attachment! I hope they all survive.
From: Evelyn Cooper [mailto:emcooper"at"bayou.com]
Sent: Sunday, January 09, 2005 12:07 PM
RE: Bluebirds Are Fighting
I have watched these three come to my feeder every day and they have been big buddies. However, when the wing waving started, the "buddy" relationship seemed to end. They have gone to fight somewhere else or rest. I did not find any dead on the ground. For a while, one held the other down so long, I feared it was dead. I figure it is best not to interfere. Last January 15th, I found a nest half built. I will probably find more of the same this year as next week we have temps predicted for the middle and upper 70's. Evelyn
From: Chris&Crystal Hill [mailto:crystaljhill"at"msn.com]
Sent: Friday, April 15, 2005 7:09 PM
Subject: Blues Fighting
I went outside today this afternoon to check/fill feeders and, to my surprise about 3-4 feet from me in the open grass, I turn around to the warble of blues - fighting. Two males rolling around on the ground, and then I see two females fighting right next to them, they would fly up a few feet entangled and then back down to the ground. I watched, they seemed to not even notice me, obviously more concerned with each other. They finally broke off, and one pair flew back to the box they (or the others) have been building in. Could this be another pair that has shown up and wants to nest? I have never seen anything like this since I put boxes in my yard...........
Crystal Hill~Georgia
From: JOHN & BARBARA SIBIO [mailto:jsibio"at"comcast.net]
Sent: Monday, May 23, 2005 10:37 AM
Subject: Nestbox competition
The pair of WEBL and their five chicks stayed in our area this time, after the chicks fledged two weeks ago. It was fortunate, because that is exactly when the swallows returned to our area, and the adults were kept busy protecting "their" nestbox. I was hoping a Green- Violet Swallow pair would nest in my second box, which is at the opposite end of my 45 foot porch, but the blues drove them off.
Over this weekend I saw a male WEBL putting grass in the second nestbox, which surprised me because I had found a nest half constructed in the box just used. The female was on the fence watching the male. The chicks are always in my yard now! Yesterday I saw a pair of birds fighting and rolling on the ground. The female blue was on the fence flapping her wings and very upset. It was an adult male, and the largest of the male chicks. I stepped outside and they flew off the ground, but continued to fight in the air. I could tell it was not the male parent of the chicks, by his color, so I assume another male came by and tried to steal the female and the nestbox.
Now the original pair is building a nest in the second box. I guess they are leaving the half-complete nest in the first box and moving to make sure the other male doesn't get entrenched. They were taking nesting material in all day long yesterday.
The chicks are still around, and the one in the fight seems fine. The yard is full of birds! I plan to leave the half-completed nest for the time being, until I'm sure they have really made a choice of boxes for their second nest.
Barbara in Cloverdale, CA
From: JOHN & BARBARA SIBIO [mailto:jsibio"at"comcast.net]
Sent: Monday, May 23, 2005 3:29 PM
Subject: Competition
This is the third season I have lived in my current home, and I have had bluebirds nesting in my garden each year. They raised three clutches each season, with a few failed nests here and there. I now have bluebirds everywhere!
The competition is a problem this year. Last year I had a new male arrive after the firsts clutch failed, and he stole the female and the nestbox from the resident male. There was a lot of fighting and rolling on the ground, but both males survived. He even attacked one of the fledglings!
This year I have the same scenario, but I believe it is more than one additional male trying to usurp the territory. The fighting has been daily for the past few days, and now the TRES are trying to take advantage of it.
I feel sorry for the original pair, as they had half a nest constructed in the first nestbox, after fighting off the TRES for a week. Now, the other
male(s) blues have shown up and fought with one chick yesterday and with the male today. Just now, a flock of TRES came by, chittering away, and swooped both nestboxes. The pair immediately perched on the roofs. They had started a nest in the second box yesterday, and I don't know if they really plan to nest there or are just claiming it.
My neighbor witnessed the fight today and was quite upset. She didn't know bluebirds were aggressive! The result is that she headed out to buy a nestbox for her yard to help provide more nesting sites to mitigate the competition. I hope she follows through. She's right across the street so I can check on things.
TRES have definitely claimed my other neighbor's bluebird nestbox. There is one perched on the roof constantly (and they DO look like killer whales!) It's getting to be quite dramatic around here.
Barbara in Cloverdale, CA
From: Paula [mailto:PaulaZ"at"columbus.rr.com]
Sent: Tuesday, May 24, 2005 10:07 AM
Subject: Subject: Competition Barbara,
How exciting! You might want to consider sending out a letter to neighbors and offer yourself as a resource for nestbox placement recommendations (pairing sounds appropriate in your area), monitoring help (if you have the time), etc. You could get yourself a regular trail going and have your neighbors enjoy the WEBL as much as you do! I have done this on my street with several of my neighbors. Some need more help than others and the ones that do a good job will be trail monitors of the future.
Paula Z
Powell (Central) Ohio
From: Conleysue"at"aol.com
Sent: Wednesday, June 08, 2005 8:43 PM
Subject: Aggressive male Bluebird
This is my first experience with a bluebird box. A pair built a nest in our (new this Spring) backyard box and successfully fledged 5 babies. During the entire process, we fed meal worms regularly by placing them in a feeder attached to the box pole.
I was able to approach the box and view the process and the babies until they were about to fledge. I then stopped viewing, but continued to provide meal worms.
The couple has begun a new nest and now the male very aggressively dives at us when we approach the feeder to place the worms. It is fairly intimidating!
Does any one have a similar experience and what can be done about it?? I am thinking of wearing my bike helmet!!
Thank you,
Susan
Bethany Beach, DE
From: Sheryl Bassi [mailto:sbassie"at"bellsouth.net]
Sent: Thursday, June 09, 2005 6:56 PM
Subject: RE: Aggressive male Bluebird
Dear Susan,
One of the members of the Louisiana Bayou Bluebird Society has some great video footage of Mr. and Mrs. B dive-bombing my Mom as she checks a nestbox. They came close enough to ruffle the top of her hair! The parents will often “dive-bomb” aggressively when they have babies in the box. While it can be a bit intimidating, I don’t know of anyone ever being injured.
It may be a good idea to wait until the parents are feeding to fill your feeder or check the box. In our area the birds are usually off the nest and feeding in the early afternoon.
Hope your second nesting is as successful as your first!
Sheryl Bassi
Leland, MS ...
From: bookfanaticef-bluebird"at"yahoo.com [mailto:bookfanaticef-bluebird"at"yahoo.com]
Sent: Friday, June 10, 2005 12:46 PM
Subject: Re: Aggressive male Bluebird--skittish vs. aggressive
I've had several pairs dive-bomb me this year, and they never quite get close enough to really do anything, like peck me. It sometimes seems they're a lot closer than they really are, and it is intimidating--which is the whole purpose of the action in the first place. To them, you are a predator, and they want to scare predators away. One pair became increasingly more aggressive as their eggs hatched & the nestlings got older. Another pair started diving at me before they had even finished the nest & had any eggs! I wouldn't be too concerned by this behavior--they probably won't hurt you, and are just being very good parents. I think it's kind of neat, actually--I've tried to get pictures of one when he was coming straight at my face, but he always swerved when I brought the camera up (I think animals see camera or binocular lenses as giant eyes, and it scares them off).
While it may only be coincidence, the pairs that always aggressively dive-bombed me all seem to have raised their first broods successfully & are now on their second--and one of those pairs is the only pair I have seen this year with their fledglings (2), who are *still* following mom & dad around a month later even though mom & dad have 5 new eggs which will hatch this week (mom & dad do seem to be tending the fledglings to some degree still).
Most of the other nesting pairs just sit in a nearby tree and call, or are even more skittish and fly away (sometimes very far) whenever I'm near their box. Then again, many of the skittish birds seem to have been successful too. Since I'm not out checking my trail every day, I can never be entirely certain if a box fledged successfully or was eaten by a snake or something towards the very end since I rarely see any adults with fledglings--but the parents might just be very good at "stashing" their new fledges somewhere away from the box.
May your bluebirds be successful!
Elizabeth F
Gainesville, FL
From: Bill Stump [mailto:bstump"at"bright.net]
Sent: Friday, June 10, 2005 9:37 PM
Subject: Re: Aggressive male Bluebird
Sue,
I have a pair of aggressive bluebirds and I just wear a baseball cap and don't look up. When my wife accompanies me on a check of the trail, she usually carries a small umbrella. If she can't see how close they get, it doesn't bother her.
Bill
SW Ohio
From: Tree Greenwood [mailto:doctree"at"crosslink.net]
Sent: Thursday, June 16, 2005 6:48 AM
Subject: Territorial Variation by Season (was "Re: The lonely eggs")
Hi, Kat.
Nesting BB are very territorial and will try to drive away any other BBs that venture into their chosen territory. Average circumference of a BB's territory is about 300' during the mating and nesting phases. In my experience, the size of the territory that a pair defends shrinks as activity switches from nest building to brooding to feeding nestlings. I guess they're too busy finding food for babies to worry about other BBs at the edges of their territory.
So the pair nesting in your yard is likely to try to drive away any and all intruding BBS of the same sex (I've seen reports of polygamous male BBs but I've never personally seen that).
BBs that I personally watched usually act as a pair in driving out intruders but the male is alway more aggressive against intruding males and the female against other females.
> Are Bluebirds territorial in Winter too?
Definitely NOT! They're pretty sociable even though you'll see some squabbles. It'll be up to banders or ornithologists with permits to determine if the flocks of BBs we sometimes see are family groups of related birds or if they really do flock outside the nesting season. When the weather is bitterly cold, a dozen BBs may huddle together in a cavity for warmth.
Bluebirds, at least my Eastern variety, are only territorial from spring until after fledglings are on their own. Then they appear to be quite sociable but possibly only in flocks of biologically related birds. Anyone know of studies on whether it's only related birds in groups? I don't but would love to know for sure.
Take care,
R J 'Tree' Greenwood
Catlett VA
From: Trish Culpepper [mailto:trishkcully"at"earthlink.net]
Sent: Thursday, June 23, 2005 12:04 PM
Subject: EABL babies 10 days old....parents dive bombing me.
Trish - Frankston, TX
I've been reading about aggressive BB behavior on the list for some time, with my BBs seeming so calm and laid back. Well, the two BB babies are now 10 days old and I'm now getting dive bombed every time I take worms to the mealworm feeder (which is nearby). I've been planning to move it further away before the babies start to make noise, for their protection, but the BB parents won't go inside either of my mealworm feeders, so was afraid they wouldn't find the worms if I moved them early on. I have the feeder with the 1.5" holes on each end and plexiglass sides and the BBs wait for the worms to crawl up to the holes and pick them out. The other feeder, about 50 feet away has the coated wire (lattice style) sides for the BBs to enter, but they aren't finding those worms at all. We'll move the feeder further away from the nest today and see what happens. Anyone had a similar experience with the BBs finding the mealworms?
From: Fultons [mailto:thefultons"at"everestkc.net]
Sent: Saturday, July 09, 2005 8:44 AM
Subject: EABL male fight
I saw the worst fight I have ever seen (actually the FIRST fight, EVER) between two males Friday evening!!! They tangled on the ground for what seemed like an eternity!! After they were done, one set by the female and the other sat on the neighbors fence and was going off! That was the most I have ever heard a EABL talking! It seems too late to be so territorial.
Could it mean that the couple is going to go for round number 3? I have never had three broods in one season before. That fight was crazy! One of them seemed to fly off okay and the one that stayed kept wiping his beak on the fence and fluffing and preening his feathers. It was crazy! Thought I would share.
Cristy
Lenexa, KS
From: MPD [mailto:imajefarm"at"hotmail.com]
Sent: Sunday, July 10, 2005 8:47 AM
Subject: aggressive male EABL
Hi all:
Awhile ago there was a thread from people more Southern than I, those who have a far longer nesting season (which is basically EVERYBODY), so I read and mentally filed the info and moved on. Now I want to add my $.02 about aggressive male EABL being more successful at raising young because they can and WILL defend the babies from threats.
My EABL pair this spring chose a box, made a nest, etc. I checked the box daily and saw the first through the fifth eggs laid. (I'm the doofus who squashed Mama in the Bluebird house door-- but she was ok, however, that DID seem to change me in their eyes from a -- whatever they think we are-- to a threat). I saw the hatchlings on day 1, and peeked in every few days till about day 10 (there were five babies) then let them alone. That leaving them alone was partly because of your advice so as not to scare babies into leaving early before they could survive. BUT it was also because Big Daddy EABL became more aggressive as the babies got to that stage of development. When they were just eggs, he didn't much care, oh well... The bigger they got the more aggressive he became. He put me back away from the box at a dead run! I thought he was gonna drill me right in the eye!!! He's cute, but even as I laughed, I RAN!
So, the babies fledged. (I have only sighted one fledgling out of possible five... sigh.) I cleaned out the nest box. The mature pair filled it with a new nest and laid one egg so far-- that I know of-- cuz Big Daddy is still absolutely determined that I do not get anywhere near that nest! He's so on guard that I can't get the box open before he's dive-bombing me.
I don't want to stress him-- he's gotta be frazzled with defending Mama and (at least one) baby, hunting for baby, guarding the nest, plus copulating with Mama several times a day to get this new nest box filled with eggs-- so I haven't pushed the issue.
My point is: I thought when the second nest was just eggs, he'd be laid back, like he was at the start of the season, but instead his aggression is escalating as the nesting season ends. It must be a hormonal thing.
There isn't much time left up here to get a second nest hatched, raised and out. So I will leave them alone, watch from afar, and catch predatory HOSP (49 so far) to protect the little sphere of world I can.
If only 1 of 5 babies is with them-- no wonder he's flying himself into a frazzle to protect his family.... What lousy odds!
Mavis in Michigan
From: Maynard Sumner [mailto:m-r-sumner"at"juno.com]
Sent: Monday, July 11, 2005 9:05 AM
Subject: Re: aggressive male EABL
Mavis,
You are doing a good job and will do better next year. I think this has been a odd year for all of us.
Maynard Sumner
Flint, MI
From: Lawrence Herbert [mailto:lherbert"at"4state.com]
Sent: Wednesday, July 20, 2005 9:24 PM
Subject: nestling in the brush pile?
Jean in Nashville and Bluebirdsters:
Jean wrote that a nest box was empty but she was being dive-bombed by a
bluebird when she was near the box and was surprised by that behavior.
Here's what I think was happening: there may have been a fledgling
in the brush pile under the nest site!
Good birding, Larry H. Joplin MO.
From: Bet Zimmerman [mailto:ezdz"at"charter.net]
Sent: Friday, July 14, 2006 8:14 AM
Subject: Bluebird Battle Video
A nasty bluebird fight is the picture of the week (actually a short video clip.) http://www.sialis.org/picture.htm
A link to this was originally posted on the Garden Web Bluebirding Forum (http://nature.gardenweb.com/forums/bluebird/ )
I’m curious – has anyone witnessed bluebirds actually killing a competitor bluebird, or puncturing another bluebirds’ egg?
Bet from CT
From: Keith & Sandy Kridler [mailto:txbluebirder"at"sbcglobal.net]
Sent: Friday, July 14, 2006 9:35 AM
Subject: Re: Bluebird Battle Video
Keith Kridler Mt. Pleasant, Texas
A couple of years ago I pulled up to a nestbox and two pairs of Eastern Bluebirds were fighting over a nestbox. All the nestboxes on that road were filled with active Bluebird nests (about 3 nestboxes per mile of roadway). Three days later I found a female bluebird that had been killed in the nestbox due to severe pecking on the back and head and neck.
There was a pair of bluebirds attempting to build over her body and nest. I cleaned out the dead female and her nest and three days later there was a bluebird egg in a new nest. I had never had a House Sparrow on this section of roadway and two years prior to this I had 32 out of 33 nestboxes along this same stretch of road with ACTIVE bluebirds nests at the same time. EXTREME pressure among bluebirds for a limited supply of nestboxes in good habitat.
I felt that this was a case of bluebirds killing bluebirds. Without a nestcam you can never be sure. I still don't have any sparrows on these roads in my nestboxes. I do have several colonies of flying squirrels that have taken over the boxes near woods several miles from this pasture location. I HAVE watched Eastern Bluebirds killing Carolina Chickadee babies. KK
From: mrtony8 [mailto:philip.berry"at"mchsi.com]
Sent: Wednesday, February 14, 2007 12:22 PM
Subject: Re: Questions
...
Bluebirds here are becoming territorial, with brothers fighting brothers. I saw one fight a few days back with the dominant male holding down his own flockmate trying to peck his eyes out. the flock of 6 has been here all winter and they have shared mealies constantly. Now is the time they establish territories and survival of the fittest. They also do not sit around looking for handouts any more. If I call them , a pair will show up eventually, but will fight off any others who show up for lunch.
Phil Berry
From: wensuz"at"isp.com [mailto:wensuz"at"isp.com]
Sent: Wednesday, March 28, 2007 4:14 PM
Subject: Bluebird battle
Hi Bluebird gang; the EABL pair that visited my nest boxes yesterday, were again here this afternoon. Only this time a second female appeared, I did not see the very beginning, but I did see the two females locked in combat for a short while, before one gave up and flew off; I'm guessing it was the 'second' female who was defeated. Once that was over, the reigning female then finally entered one of the boxes to join the male who was waiting inside. They stayed together in the box for maybe a minuet, then the male exited first, followed a short time later by the female. I do believe it looks as though they will use my boxes to
start a new generation of EABL!:) -Wendy-N Central
Ohio
From: Bob Walshaw [mailto:walshaw1"at"cox.net]
Sent: Thursday, April 26, 2007 2:34 AM
Subject: Re: I have same problem in PA
Regarding aggressive Bluebirds, I have a pair that have dive bombed me two years running, several times even hitting my straw hat. I only wish all of them would be as aggressive toward house sparrows!
PS - I don't comment on Tree Swallows as I do not have them here in this part of NE OK
From: mrtony8 [mailto:philip.berry"at"mchsi.com]
Sent: Sunday, April 29, 2007 5:26 PM
Subject: Trail Report Lots of Action
Today's trail check was a great experience. We have our first EABL fledges, lots of others ready tomorrow, and more coming next week. The interesting part is the trail itself. Our golf course has been wiped out by hurricane Ivan. The west course has been reopened for about 18 months. The east course is still unused. That part of the course is going back to nature, more or less. Besides our bluebirds, which are everywhere, we saw birds today that I haven't seen in numbers in years.
Red Headded Woodpecker (extremely rare for about ten years now) ---- I counted 13 of them. Most seemed to have active nests.
Nightjar-----again, ten years or so since I have seen one.
Sora---- 25 birds in one area. I would feel lucky to see ONE bird. These have been here about a week now.
The Florida Snapping Turtle-
http://pelotes.jea.com/AnimalFact/Reptile/snapturt.htm
This guy just looks mean. I picked him up because he was in the fairway. He astonished me to weigh 45 pounds. And he almost got me. What a vicious character. Usually don't see one, I remember them from my youth, but it has been years.
And the best part, we witnessed a brawl between HOSP and EABL. As I approached a box I knew had bluebird babies in it, I saw the tell-tale black bib sticking out of the box. My heart sunk. I chased him away knowing what to expect in the box. . Surprise!!! All babies wre intact and breathing heavily. I closed the door and watched from a distance. HOSP flew back at the box. As he got almost in it, Dad bluebird hit him hard. Both Mom and Dad grappled him to the ground, got him on his back, and pummelled him until he flew off. They continued to wing wag and carry on and in about 5 minutes he came in again. This time both blues hit him hard at the same time. He once again hit the ground on his back. They nailed him again. I assisted them in clapping and hollering at him, driving him off at last. We waited another half hour or so for him to return, but he has not so far. Mom and Dad are still vigilant, watching for him. I believe they actually set a trap for him the second time, she sitting nearby and he in the top of a tree, watching.
When he thought the coast was clear he made a dash for the box. They were waiting for him.
This is our fifteenth year for our trail and I have never seen this before.
Just another day in the life of a bluebird, I would guess.
Phil Berry
Gulf Breeze, Florida
From: cabin8 "at"optonline.net [mailto:cabin8 "at"optonline.net]
Sent: Monday, May 21, 2007 8:54 PM
Subject: attacked by parents
I have been feeding my BB's mealworms in a feeder for over a month now. Not many- and every other day but they are use to me. Plus I have been checking their box once a week for a month also. After they laid their eggs they would come over to the tree next to the box and stay close to me. But today I checked and the 4 eggs have hatched. I couldn't even see the babies because they were carrying on so much i didn't want to upset them.. The male came about 8 inches from my head flapping his wings and they were both dive bombing me.
I had a pair of birds last year that didn't seem to mind me checking their boxes. and I have another pair now near the house that don't mind.
Is it natural for them to be so upset? Should I just leave them alone and not check the nest?
Becky
From: bridget mcgann [mailto:lilbmcg "at"gmail.com]
Sent: Monday, May 21, 2007 9:08 PM
Subject: My First Bluebirds!!
I finally have a nesting pair of Bluebirds! I'm so excited!!
For those who don't recall, I live in northern Indiana (right below the MI border) and have been birding for two years. I haven't gotten any bluebirds in my back yard but this year I decided to put some houses up on a property my dad owns a few miles away. I have seen a bluebird once in my back yard and another one once on this property. Well, last week my dad told me he saw a pair checking out one of his houses, and sure enough we went back there yesterday and saw four eggs in the box! I was absolutely elated, and put some mealworms out to show my appreciation. ;) They thanked me today by laying another egg.
But boy are these birds aggressive! They divebombed me ruthlessly just like the Tree Swallows! Unlike the TRES, though, they seemed to tire quickly and eventually retreated to the powerlines above to watch, divebombing me every so often. I was a little on edge today as I had to install a sparrow spooker and in fact spent quite a long time fiddling with the nestbox. I felt bad and hurried as much as I could, but it took a while and they eventually flew over to a tree about 100 yds away and it was hell waiting for them to come back, but they did. And they had lots of mealworms waiting for them too. ;)
Also of note: The nestbox the EABLs seem to have chosen is also the same box that my TRES chose last year. Same box, different location. Must be a good design! But it takes forEVER to open -- that is why I put a different box up by the lake for the TRES this year. The longer I have to spend opening/closing the box, the longer I get divebombed. But since it turns out the EABLs are divebombers too, it's a lost cause!
Across the property we had put up another box in which I discovered a fully constructed HOSP nest and 2 eggs. I haven't had enough time to monitor a trap yet, so I poked a hole in each egg then put them back in the box. I am afraid that if I destroy the nest they'll go try and steal the bluebirds' nest or something...I'm going to go back and trap them at the earliest opportunity.
My goodness, I am so thrilled! All my work and patience has finally paid off! The EABLs are rather skittish so I haven't gotten any good photos of them, but what I do have you can see here:
http://www.flickr.com/photos/tinkertart/sets/72157600237544244/
Update on my Song Sparrows in a bit...Thanks for letting me share!
Bridget McGann
Granger, IN
From: Evelyn Cooper [mailto:emcooper "at"bayou.com]
Sent: Monday, May 21, 2007 9:11 PM
Subject: RE: attacked by parents
Nah, keep checking them. You need to monitor. Let em dive bomb you, it doesn’t hurt anything. If you feel uncomfortable, wear a hat. I like to see them be aggressive like that.
Evelyn, Delhi, LA
From: Duane Rice [mailto:drbirdsong4 "at"hotmail.com]
Sent: Monday, May 21, 2007 10:34 PM
Subject: RE: attacked by parents
Becky,
It's perfectly natural and a good thing. I always talk to the ones that are dive bombing me. I tell them what a good job they are doing protecting their young.
I've gotten used to it, though some never do.
Wear a hat/cap, of course, and remember the real reason your are monitoring, is that you are also looking out for their best interests.
DR
From: Bob Walshaw [mailto:walshaw1 "at"cox.net]
Sent: Monday, May 21, 2007 10:54 PM
Subject: Re: attacked by parents
Just keep up your normal weekly checks. This is normal behavior - as Keith says in his great talks, they see us as predators, no matter how much we help them. I have a pair where the male has hit my hat twice while dive bombing me! Even hummingbirds will dive bomb you. Bluebird Bob
From: bstump [mailto:bstump "at"bright.net]
Sent: Tuesday, May 22, 2007 9:17 AM
Subject: RE: attacked by parents
Becky,
Keep checking! If their aggressiveness bothers you, wear a baseball cap or carry a small umbrella where you can't see how close they come. They won't hit you. There just "doing their job" as parents, protecting their young!
From: Lynn Ward [mailto:lWard "at"pmai.org]
Sent: Tuesday, May 22, 2007 9:35 AM
Subject: RE: attacked by parents
I find that all bluebird couples react differently when you monitor. Some go crazy like yours (I have a pair like that this year) and some don't make a peep - just watch you. I am happy when some are aggressive and give their warning calls over and over. This is teaching their nestlings in the box to beware of predators. It's the quiet ones that bother me. I wish they'd put up more of a fuss.
Lynn Ward
South Central Michigan
From: Bruce Burdett [mailto:blueburd "at"verizon.net]
Sent: Tuesday, May 22, 2007 11:18 AM
Subject: Re: Swoopers
Becky,
Just ignore those dive-bombers. I've been swooped by many different kinds of birds, most commonly Tree Swallows but occasionally by Bluebirds as well.. I've *never ever* been hit by one. The only bird that ever hit me was a Brown Thrasher, and he (she) actually drew blood. (With that beak, who's surprised?) I've also been swooped by various kinds of Terns, and by some Black Skimmers. The Skimmers were the scariest because they're so big and black, but they never hit me.
Make it a game. See if you can stare the Bluebirds straight in the eye without blinking or flinching when they come in at you.
It's something of a challenge, but it heightens the excitement. (We all need heightened excitement, right?) The Tree Swallows are even more of a challenge because they tend to bomb you in squadrons, and from all directions.
...
Bruce Burdett SW NH
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