USGS Multimedia Gallery
Title: Bird Migration Card - 1939
Description: 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 researchers because they will help them unravel the effects of climate change on bird behavior. This card: Eastern Robin
Date Taken: Oct 29 1939
Usage: This image is public domain/of free use unless otherwise stated. Please refer to the USGS Copyright section for how to credit the photo.
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