Bluebird and Small Cavity Nester Conservation

Sialis - Bluebirds and other small cavity nesters

Nest, Egg, Young and Adult Photos

Small Cavity Nesters: Learn to recognize birds, nests and eggs that may show up in Bluebird nestboxes.
Click on any thumbnail for a larger version. The photographer's name in listed in parentheses after each picture.
See Nests for a narrative description of nests and eggs, and Eggs for a table showing relative egg sizes.

SPECIES	Nest, Side View	Eggs	Nestling	More	Adult
Bluebird, Eastern EABL Bio \| Photos BBS Map
Bluebird, Mountain MOBL Bio \| Photos BBS Map
Bluebird, Western WEBL Bio \| Photos BBS Map
Chickadee, Black-capped BCCH Bio \| Photos BBS Map
Chickadee, Boreal BOCH Chickadee Bio \| Photos BBS Map
Chickadee, Carolina CACH Bio \| Photos BBS Map
Chickadee, Chestnut Backed CBCH Chickadee Bio \| Photos BBS Map
Chickadee, Mountain MOCH Bio \| Photos BBS Map
Cowbird, Brown-headed BHCO Bio \| Photos
Eurasian Tree Sparrow ETSP Bio \| Photos
Flycatcher, Ash-Throated ATFL Bio \| Photos BBS Map
Flycatcher, Great Crested GCFL Bio \| Photos BBS Map
House Finch HOFI Bio \| Photos
House Sparrow HOSP Bio \| photos and more photos. BBS Map
Nuthatch, Brown-Headed BHNU Nuthatch Bio \| Photos BBS Map
Nuthatch, Pygmy PYNU Nuthatch Bio \| Photos BBS Map
Nuthatch, Red-breasted RBNU Nuthatch Bio \| Photos
Nuthatch, White-breasted WBNU Bio \| Photos BBS Map
Purple Martin PUMA Bio \| Photos BBS Map
Prothonotary Warbler PROW Bio \| Photos BBS Map
Starling, European EUST Bio \| Photos
Swallow, Tree TRES Bio \| Photos BBS Map
Swallow, Violet-Green VGSW Bio \| Photos BBS Map
Titmouse, Bridled
Titmouse, Juniper JUTI Titmouse Bio \| Photos BBS Map
Titmouse, Oak OATI Titmouse Bio \| Photos BBS Map
Titmouse, Tufted TUTI Titmouse Bio \| Photos BBS Map
Wren, Bewick's BEWR Bio \| Photos BBS Map
Wren, Carolina CARW Bio \| Photos BBS Map
Wren, House HOWR Bio \| Photos BBS Map
Mice Info
Squirrels, Red Info on Red Squirrels
Squirrel, Flying Info

Also see:

Cavity nester photos of nests eggs and young

Descriptions of cavity-nester nests and eggs + Clues on Nests | Eggs
PHOTO ALBUM with pictures of cavity nesting birds, nests and eggs
TABLE showing relative sizes of eggs, and egg photos side by side
Preferred habitat, by species

Downloadable 2 page guide (PDF) to common nests found in CT
Mystery nests (have fun trying to guess)
Unusual nest sites Part 1 Part 2 and nestbox specs by species
Weird eggs (e.g., dwarf, odd coloration)

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

Always keep in mind that the nestboxes you build, install and monitor today, may well be your very real connection to friends and loved ones long after you are gone.
- David Gwin, Bluebird_L, 2006

May all your blues be birds!

Photo in header by Wendell Long. 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.
© 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 12, 2010 . Design by Chimalis.