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Here are some more so you can see better. I have the whole series but these should give you the idea.



That's my daughter holding the box. Cathy

Central NY
TMB StudiosIt depends on the box and on how much time I have. I had this one, which someone made for me…

But that type doesn’t work with the boxes I have now, which have a roof that is peaked in the middle. I just made one out of a cardboard box this past week when I thought I saw a wren looking at a box my Chickadees are nesting in. It’s a cobbled together thing, not very pretty, but it seems to be working so far. There’s a thread on the old BluebirdNutCafe forum – I’ve brought the most pertinent posts with photos over here and made them a sticky topic at the top of this forum. If you want to see the whole discussion you can see it here: How to Make a Wren Guard. It has quite a few ideas.
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This reply was modified 10 years ago by
The Original Bluebird Nut.
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This reply was modified 10 years ago by
The Original Bluebird Nut.
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This reply was modified 10 years ago by
The Original Bluebird Nut.
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This reply was modified 10 years ago by
The Original Bluebird Nut.

Central NY
TMB Studios

Central NY
TMB StudiosGood mama!

Central NY
TMB StudiosWhether or not to discard the nest is a judgment call. If you’ve got wrens, have a wren guard at the ready to install the minute they lay another egg, whether in the same box, or a different one. You’ll have a battle on your hands.

Central NY
TMB StudiosWhen you find Chickadees nesting in a box, and Bluebirds wanting to take it over, you can put a 1 1/8″ hole protector over the entrance hole to prevent the Bluebirds from predating the nest.

Central NY
TMB StudiosTechnically, you don’t have to remove them at all. In the wild, birds don’t have people to remove the eggs for them. Unless they break (which isn’t common), there’s no need to remove them.

Central NY
TMB Studios

Central NY
TMB StudiosThat’s a great idea, Gin! I’ll have to remember that if my HOWR come back this year!

Central NY
TMB StudiosHave you seen any HOSP or House Wrens?

Central NY
TMB StudiosSome people remove unhatched eggs, others just leave them. Unless it is very hot, there’s not a great deal of danger. The egg won’t attract a predator unless it leaks or gets broken or explodes (and there are various opinions about whether hot eggs actually explode or not). I’ve sometimes left unhatched eggs in the nest, and never had an issue. If it should crack or show signs of being broken, then you might want to remove it. The adults might take care of it themselves, anyway – either removing it, or pushing it out of the nest into the bottom of the box.
As for posting pictures, you have to use the url for the image itself, not the album page it’s on. I fixed it for you this time. Look at the instructions in the Posting Guidelines sticky thread for more info.

Central NY
TMB StudiosApril 19, 2016 at 11:14 am in reply to: Finally – 2 blue eggs – but strange thing happened. . . #1533

Central NY
TMB StudiosMy female last year laid white eggs, too – a first for me.
Not sure I’ve ever seen dents like that on an egg. It could just be an imperfection. Let’s hope so…I guess time will tell.

Central NY
TMB StudiosFrom Sialis.org:
Bluebirds: Parasitism in bluebird nestboxes with properly sized holes is not common. Cowbirds occasionally parasitize nests in nestboxes. The female is capable of squeezing through 1.5″ hole, however they probably prefer a larger hole (1.75″ or maybe a Peterson hole). Keith Kridler has found Cowbird eggs right beneath a bluebird nestbox entrance hole, and wonders whether the tight squeeze will sometimes “pop” an egg out of the female as she enters the box.
Cowbirds are tricky…detailed information on them can be found on the Sialis website.

Central NY
TMB StudiosCould be a House Wren – sometimes they’ll remove the nestlings and throw them on the ground. HOSP would usually mutilate. Any disturbance noted in the nest? Could be a baby that died of natural causes and the parents removed it, but that’s not the first thing I think of. Have you seen House Wrens or HOSP?
I like this chart.

Central NY
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