National Audubon Society Birds of North America: A Guide Review
10,000 Birds
JUNE 1, 2021
Interestingly, Chestnut-collared Longspur does appear under its brand-new official name, Thick-billed Longspur, though the description underneath uses the old name. Plate 28 from Audubon Bird Guide, Eastern Land Birds, by Richard H. Pough “with illustrations in color of every species” by Don Eckelberry, Doubleday, 1946.
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