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An introduction to prominent stars and constellations.
An introduction to the tracks and signs of familiar North American species.
An introduction to familiar species.
An introduction to familiar urban species.
A color guide to familiar Great Lakes species.
More than 1,500 species identified.
Identifying nearly 1,300 non-passerine bird species.
Combining information from both Eastern and Western field guides.
Birds east of the Rockies.
Birds west of, and including, the Rockies.