It is likely too late to save this year's cavity nesters but perhaps next year this may be of some help:
http://www.sialis.org/wrens.htm#guard

Ruth Mano
Everett, WA

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>
> Message: 9
> Date: Fri, 5 Jun 2015 19:07:00 -0700
> From: "Joseph Higbee" <jvhigbee at hotmail.com>
> Subject: [Tweeters] House Wren- Bah, Phooey
> To: "Tweeters" <tweeters at u.washington.edu>
> Message-ID: <BAY177-DS1637D818D368D8C1BD4301D7B10 at phx.gbl>
> Content-Type: text/plain; charset="iso-8859-1"
>
> I have just posted some doings here in the yard concerning a House Wren that makes Starlings and House Sparrows seem like innocents. Here is the link, scroll to June 5:
> http://josephvhigbee.com/blog/blog.html
>
> Joseph Higbee
> Spanaway, WA
> Mailto: jvhigbee at hotmail.com
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