Date: 3/30/18 4:47 pm
From: Kathy Clark <0000001dc30ca77c-dmarc-request...>
Subject: Re: Bluebirds n wrens in nestboxes

If you keep removing the old stick nests that are not "real nests" meaning they have no lined cup, eventually it should lessen. Keep us informed. We try to help!

Kathy Clark, New Cumberland, PA

-----Original Message-----
From: Gerald Kruth <00000005ead0dac6-dmarc-request...>
Sent: Thu, Mar 29, 2018 5:00 pm
Subject: Re: [PABIRDS] Bluebirds n wrens in nestboxes

Hi Marianne,

I usually post to the Serve, in case others want to weigh in.

This wren dilemma is nothing new.

In my forty-two years to build and erect nestboxes, I have experienced that any fenceline as boundary from pasture to woodlot or heavy shrub, is where House Wrens like to congregate. I have seldom found them in deep woods, never in pasture or wetland.

You seem to have covered options pretty well. I am sure the wrens are jamming boxes with sticks just to deter neighbors.They will occupy one box to nest, but will jam any other nearby boxes. The real nestbox will have a tiny cup of grass up on top of the sticks. Since you have so many boxes, you might want to see if they are stick-jamming, and try removing some to see what happens?. They are not building real nests there, so there should not be anything legal or ethical about it.

I think there was this discourse last year about wren incursion. Anybody else is welcome?

Jerry Kruth

-----Original Message-----
From: Rick & Marianne Atkinson <marianne5...>
To: gkruth <gkruth...>
Sent: Thu, Mar 29, 2018 2:50 pm
Subject: RE: [PABIRDS] Eastern Bluebird behavior - Clearfield County

And thank YOU for your kind words!

My boxes are mostly in large fields, away from shrubbery etc. What habitat should I avoid to deter the wrens?

Ironically, I have over 20 wren boxes, situated along the edges of the woods or shrub rows, with the hope that the wrens will leave the bluebird boxes alone. No such luck! They use THOSE boxes also!



From: <gkruth...> [mailto:<gkruth...>]
Sent: Thursday, March 29, 2018 11:59 AM
To: <marianne5...>; <PABIRDS...>
Subject: Re: [PABIRDS] Eastern Bluebird behavior - Clearfield County

Thanks for the nice post. It is refreshing to see the joys people can experience from nestboxing, and it provides habitat and safety to our little friends.

Wrens are always a problem. keeping most boxes away from their habitat is the best way I know to foil them.

Jerry Kruth


-----Original Message-----
From: Rick & Marianne Atkinson <marianne5...>
Sent: Thu, Mar 29, 2018 8:28 am
Subject: [PABIRDS] Eastern Bluebird behavior - Clearfield County

Sorry for the late post.

On March 27, I observed a pair of bluebirds on my property checking out 4 of
the 14 bluebird boxes that I have, in a period of about 10 minutes. I
cleaned the boxes out in the middle of Feb. during the warm weather. :-)

I saw the male and female bluebirds go into and also perch on 4 different
boxes that are in the same general area. I hope they hurry up and start nest
building and fledge their young before the House Wrens come back. I have
seen the wrens destroy and remove bluebird eggs and all nesting material
from boxes, before making their own nest.

The wrens have also just built their nest on TOP of the bluebird nests. They
have done this to tree swallow nests also.

Marianne Atkinson

Near DuBois

Clearfield County
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