Bird Migration Card - 1937
Image scan of a historical bird migration card. This is just an example of the more than 6 million handwritten cards stored in government files, in the North American Bird Phenology Progam, with more than a century of information about bird migration, a veritable treasure trove for climate-change re...
Location: McMillan, MI, USA

Bird Migration Card - 1939
Image scan of a historical bird migration card. This is just an example of the more than 6 million handwritten cards stored in government files, in the North American Bird Phenology Progam, with more than a century of information about bird migration, a veritable treasure trove for climate-change re...
Location: USA

Bird Migration Card - 1933
Image scan of a historical bird migration card. This is just an example of the more than 6 million handwritten cards stored in government files, in the North American Bird Phenology Progam, with more than a century of information about bird migration, a veritable treasure trove for climate-change re...
Location: USA

Bird Migration Card - 1921
Image scan of a historical bird migration card. This is just an example of the more than 6 million handwritten cards stored in government files, in the North American Bird Phenology Progam, with more than a century of information about bird migration, a veritable treasure trove for climate-change re...
Location: USA

Bird Migration Card - 1933
Image scan of a historical bird migration card. This is just an example of the more than 6 million handwritten cards stored in government files, in the North American Bird Phenology Progam, with more than a century of information about bird migration, a veritable treasure trove for climate-change re...
Location: USA

Bird Migration Card - 1922
Image scan of a historical bird migration card. This is just an example of the more than 6 million handwritten cards stored in government files, in the North American Bird Phenology Progam, with more than a century of information about bird migration, a veritable treasure trove for climate-change re...
Location: USA

Bird Migration Card - 1939
Image scan of a historical bird migration card. This is just an example of the more than 6 million handwritten cards stored in government files, in the North American Bird Phenology Progam, with more than a century of information about bird migration, a veritable treasure trove for climate-change re...
Location: USA

Bird Migration Cards
Volunteers Derek Smith (white shirt) and Reuben Anderson sort through migration cards in the Bird Phenology Program Office....
Location: USA

Bird Migration Cards
North American Bird Phenology Program Coordinator Jessica Zelt working with old migration bird cards....
Location: USA