A field guide to western birds' nests of 520 species found breeding in the United States West of the Mississippi River.

Field Guide to the Birds' Nests of the United States, East of the Mississippi River

A Peterson Field Guide to Eastern Birds' Nests: United States East of the Mississippi River

A Field Guide to Western Birds' Nests: Of 520 Species Found Breeding in the United States West of the Missisppi River

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A Field Guide to Western Birds' Nests: Of 520 Species Found Breeding in the United States West of the Missisppi River