Bird Housing

Protect Your Bluebirds

Protect your nestlings with the Bluebird House & Wren Shield at

What happened to your bluebird eggs last year? Did you find your eggs or nestlings on the ground, without knowing why? Then it sounds like a House Wren visited your bluebird house last year. Protecting your bluebirds from House Wrens may be as simple as using a Wren Shield.

“Some [people] have found [Wren Shields to be] very successful…because House Wrens tend to perch on the roof and then enter the box, or fly in from short distances,” according to Wren Shields commonly appear as a hanging flap in front of the entry hole. Designed to blend in with the birdhouse, a Wren Shield blocks the entrance from view. The classic adage, “Out of sight, out of mind!” applies to the birds in your backyard, too.

The Wren Shield uses a simple camouflage technique that’s surprisingly effective at preventing House Wrens from entering the new nesting site. And they won’t return to take over said nesting site next year, either. Besides, it’s hard to take over a nesting box when you can’t see the entrance!

Since House Wrens are native birds, it’s illegal to remove or harm them in any way because they’re protected under the Migratory Bird Treaty Act. Preventing House Wrens from entering your birdhouse is of the utmost importance — and the most effective way to protect your bluebird nestlings. Do your bluebirds a favor this year and protect them from House Wrens with the durable Bluebird House & Wren Shield, now available at

Happy Birding! Here’s a fun quote about wrens (probably the relentless House Wren!):

“There was an old man with a beard, who said: “It is just as I feared! Two owls and a hen, four larks and a wren have all built their nests in my beard.” — Edward Lear

Written by Dawn Coutu


Sources and Interesting Links:

Harbison, Martha. “The Migratory Bird Treaty Act, Explained,” Audubon. Mar. 9, 2017. May 22, 2015. <>.

“House Wren,” The Cornell Lab of Ornithology: All About Birds, Cornell University. Mar. 9, 2017. 2015. <>.

Smith, Elizabeth Zimmerman. “Discouraging House Wrens,” Woodstock, CT. Mar. 9, 2017. May 16, 2016. <>.

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  • Karen Mastroianni March 11, 2017 at 8:05 am

    I had 3 nestling bluebird babies killed..I had watched them from the time the mother laid the eggs. But it wasnt a was some kind of sparrow..not originally indigeonous to the US..I actually saw him enter the house after perching on the top periodically. I just thought he was in the wrong area because I had two houses 50 ft. apart.

    • Heidi Babb April 10, 2017 at 11:53 am

      Karen, I’m sorry you lost 3 nestlings — that’s very sad. House sparrows can be aggressive predators for bluebird nestlings. They’re not native to North America, and can be very hard to control. Give us a call if you have any questions — we’re at 888-879-5095, Monday-Friday from 8:30am to 5:00pm ET.