Roger Tory Peterson (August 28, 1908 – July 28, 1996) was an American naturalist, ornithologist, illustrator and educator, held to be one of the founding inspirations for the 20th-century environmental movement.
The Peterson Field Guides (PFG) are a popular and influential series of American field guides intended to assist the layman in identification of birds, plants, insects and other natural phenomena. ...
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