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A pintail duck egg, partially developed embryo, and recently hatched chick lined up to illustrate the progression of development.
A black tern nest with three eggs.
Close view of a pelican chick just emerging from its shell. William L. Finley visible in the background.
A black tern nest with three eggs.
A black tern nest with three eggs. Image note: large.
Herbert Brown standing beside a cholla cactus looking at a Palmer thrasher nest.
Pyrrhuloxia sitting in nest with open mouth. Image note: small size.
Pyrrhuloxia sitting in nest with open mouth. Image note: small size.
Pyrrhuloxia on nest with mouth open. Image note: side view, small size.
Pyrrhuloxia on nest with mouth open. Image note: small size, not very good.