Bluebird Nestbox Design

I am a County Coordinator for the VBS.  Here are suggestions from the VBS taken from their website.  I use these guards and want to emphasize their importance using on nestboxes for the chicks’ safety.


VBS:  “We have evolved a bluebird nestbox over the past few years which is working well on our trails.  The bluebirds seem to like the design, and it is easy to monitor and clean out.”


Download nest box design

Download a diagram showing the recommended box mounting method

Predator Guard Designs:

VBS:  “We utilize two types of predator guards to help limit predation of our bluebird nestboxes. One we call the Cat/Raccoon Guard is made of a heavy wire mesh (hardware cloth) and goes on the front of the nest box to help fend off raccoons, cats, opossums, large birds, etc.  This works by backing the critters off so it is too far of a reach into the box to get the eggs or babies. The pattern for the Raccoon Guard now posted on this site is slightly different from our original version. We have changed it to make it easier to cut out and lace together. The other guard, Snake Guard, is made of round metal ducting material and is installed on the mounting pole for the nest box. This guard is primarily to inhibit access by snakes which just love to dine on little birds and eggs. This guard can also fend off climbing cats, squirrels, raccoons, etc.  (It also provides a bit of a challenge for squirrels when used on pole-mounted bird feeders.)”

Download diagram showing correct predator guard mounting

Photo below from the VBS:   “Don’t let this happen to your bluebird nestbox!  Mount your nestbox on a metal pole, use a Snake Guard, and position your nest box away from nearby and overhanging branches.”

I saw this on my first year of seeing bluebirds at Woolwine House.  The box was on a 4x4 wood post--any snake or other ground predator (including raccoons, mice, feral cats, and ants) can get to the bluebird chicks.

I saw this on my first year of seeing bluebirds at Woolwine House. The box was on a 4x4 wood post--any snake or other ground predator (including raccoons, mice, feral cats, and ants) can get to the bluebird chicks. This rat snake is more than likely leaving the box after his rest from his meal of some young cavity nesting chicks, possibly bluebirds or another cavity nesting brood. Please note that the hardware cloth Noel Guard is not installed on this box. Christine on 09-20-09.

 The Black Rat Snake you see here is a “good” snake.  We need snakes and they need to survive, too.   They have unbelievable climbing ability using their scales and are fascinating in nature.  They have plenty of food sources on the ground and otherwise.  We bluebird monitors prefer they NOT eat from our installed cavity nestboxes, understandably.  Our goal is to have successful bluebird fledgings and to help the bluebirds continue to thrive and increase their survival rate in the past decade from the use of man-made installed nestboxes.   Once chicks fledge, they still may not survive due to predators.   More on that topic of the survival of fledgings  in an upcoming post!  


Notes by Christine (09-20-09):  Please feel free to contact me if you have questions on these nestbox designs and the use of predator guards.   I would like to help.  Do you want to install a box or a trail in Patrick County, VA?  Let me know!  Just leave a voice message at 703-919-4302 with your name and contact phone number and a convenient time to call.  I’ll get back to you as soon as possible.   I would be happy to speak to you and to help you install a box or nestbox trail in Patrick County, VA.  If you live elsewhere and need some guidance where to start, let me know that, too.  I can guide you in the right direction. Thank you for your interest and support in helping our beautiful Eastern Bluebird.  See the Virginia Bluebird Society’s website for more information on optaining a grant for your organizationfor new and refurbished bluebird trails and for youth and scout organizations (see this link to the VBS page):

I am attending the November 7th, 2009, VBS State Conference in Bedford, VA.   I look forward to meeting my fellow Virginia bluebirding colleagues at the conference and learning more how I can better serve our native birds.  


  1. Hello Christine, What a wonderful Web Page, My I link your site with mine?
    About DE Please read this link to my web-site

    It is safe to use and will not harm the nestlings. one or two poofs of DE in the middle of the nest material during the second nesting. because Blowflies are not active until it is 75 degrees night and night. My web site covers DE information thoroughly, please visit my site at


  2. I dont know If I said it already but …I’m so glad I found this site…Keep up the good work I read a lot of blogs on a daily basis and for the most part, people lack substance but, I just wanted to make a quick comment to say GREAT blog. Thanks, 🙂

    …..Frank Scurley


    • Frank, many thanks for the note. I’m glad my blog stands out. I want it to be pleasant to look at, positive in general, and certainly a learning tool for new bluebirders out there. I enjoying sharing what I’ve learned and the joys of birds and bluebirding.


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