Bluebird and Small Cavity Nester Conservation
Sialis - Bluebirds and other small cavity nesters


Cavity-nester Egg ID and Comparisons

Cavity nester photos of nests eggs and young

Cavity Nester Nests, Eggs and Young Photos and Bios. Also see Nest ID Matrix (contents) and Egg ID Matrix (color, spots, etc.)

Egg comparison
  Photo shows relative size of some speckled cavity nester eggs, with the Black-capped Chickadee being the smallest. Photo by Bet Zimmerman.
Egg comparison.

Left to right: Bluebird, House Sparrow, Tufted Titmouse, House Wren, Black-capped Chickadee eggs relative to a dime. Photo by Bet Zimmerman.

TUTI and BCCH eggs.
  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.
BCCH and HOWR eggs.   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 comparison.   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

HOME | Basics | Resources | House Sparrows | House Wrens | Nest/Egg ID | Site Map and Search | Suet Recipes | Tree Swallows | Contact me Bluebird Conservation

May all your blues be birds!

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 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!

Photo in header by Wendell Long.
© Original photographs are copyrighted, and may not be used without the express permission of the photographer. Please honor their copyright protection.
See disclaimer, necessitated by today's sadly litigious world.
Last updated March 24, 2016. Design by Chimalis.