2011 Bears Breeding Eggs 
10,000 Birds
JUNE 1, 2021
The first guide bearing the National Audubon Society imprint was Audubon Bird Guide; Eastern Land Birds , written by Richard Hooper Pough, and illustrated by Don Eckelberry. Press, 2011, cited as “RTP to Paul Brooks, March 6, 1945, Peterson Institute.” Audubon guides to birds have been around since 1946.
10,000 Birds
JULY 21, 2011
The clifftop habitats along rocky shores of the North Atlantic (on both sides of the pond) abound in bird biomass during breeding bouts, for instance. Accessed July 12, 2011 at [link] a. There are probably other major trends that depend, for example, on latitude and timing. Sources Laden, Greg. Birdingblogs.com Leigh, Egbert Giles.
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