Photo shows relative size of some speckled cavity nester eggs, with the Black-capped Chickadee being the smallest. Photo by Bet Zimmerman.
Left to right: Bluebird, House Sparrow, Tufted Titmouse, House Wren, Black-capped Chickadee eggs relative to a dime. Photo by Bet Zimmerman.
Two Tufted Titmouse eggs compared to a Black-capped Chickadee egg. Nest and eggs are hard to tell apart initiallyl, although Tufted Titmouse nests tend to be bulkier and have dried leaves. Photo by Bet Zimmerman.
Black-capped Chickadee egg relative to House Wren egg. Chickadee eggs have little gloss, House Wren eggs tend to be glossier. Photo by Bet Zimmerman.
Egg size comparison, including Robin egg. Photo by Bet Zimmerman.
ALSO SEE: Egg ID online - Royal Alberta Museum with photos for all birds (not just cavity nesters)
O bluebird, welcome back again, Thy azure coat and ruddy vest, Are hues that April loveth best....
- John Burroughs, The Bluebird
If you experience problems with the website/find
broken links/have suggestions/corrections, please contact me!
The purpose of this site is to share information with anyone interested
in bluebird conservation.
Feel free to link to it (preferred as I update content regularly), or use text from it for personal or educational
purposes, with a link back to http://www.sialis.org or
a citation for the author. No permission is granted for commercial use. Appearance of automatically generated Google or other ads on this site does not constitute endorsement of any of those services or products!