EggsCavity Nester Egg ID & Size Comparison

Cavity Nester Egg ID & Size Comparison

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

Egg comparisonPhoto 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.



O bluebird, welcome back again, Thy azure coat and ruddy vest, Are hues that April loveth best….
– John Burroughs, The Bluebird



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