ebird at Cornell
”Discover movements, range boundaries, and areas of abundance for over 600 North American birds. Follow bird populations on a weekly basis across the entire Western Hemisphere at an astounding level of detail.”
https://ebird.org/
Recommended Citation for Status and Trends Products:
Fink, D., T. Auer, A. Johnston, M. Strimas-Mackey, O. Robinson, S. Ligocki, B. Petersen, C. Wood, I. Davies, B. Sullivan, M. Iliff, S. Kelling. 2020. eBird Status and Trends, Data Version: 2018; Released: 2020. Cornell Lab of Ornithology, Ithaca, New York. https://doi.org/10.2173/ebirdst.2018
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