An international standard for a mapping method in bird census work recommended by the International Bird Census committee
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Audubon Field Notes↗
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Distribution of North American birds. The breeding distribution of the dickcissel
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Audubon Field Notes↗
The changing seasons--the 1968 spring migration
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Audubon Field Notes↗
Snowy owls were recorded on 58 Christmas counts this year [map]
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Audubon Field Notes↗
A program for the preservation of documentary photographs
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Audubon Field Notes↗
Fiftieth Christmas bird count. A summary of largest counts of individuals
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Audubon Field Notes↗
The changing seasons
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Audubon Field Notes↗
Nineteenth breeding-bird census. 9. Virgin bottomland white spruce forest
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Audubon Field Notes↗
Distribution of winter blackbird roosts east of the Appalachians
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Audubon Field Notes↗
The ninety-fourth Christmas bird count. Georgia/Florida
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National Audubon Society Field Notes↗
The ninety-fifth Christmas bird count. Georgia/Florida
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National Audubon Society Field Notes↗
Fifty-second Christmas Bird Count
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Audubon Field Notes↗
Fifty-third Christmas Bird Count
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Audubon Field Notes↗
Fifty-first Christmas bird count. Summary of highest counts of individuals
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Audubon Field Notes↗
Fifty-third Christmas Bird Count. Summary of highest counts of individuals
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Audubon Field Notes↗
Thirtieth breeding-bird census. 42. Mature tulip poplar forest (suburban woodlot)
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Audubon Field Notes↗
Fifty-first Christmas bird count. 134. Ocean City, Md
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Audubon Field Notes↗
Fifty-third Christmas bird count. 141. Ocean City, Md
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Aubudon Field Notes↗