Rare sparrows make guest appearance at Penn

Earlier this year, Penn Medicine epidemiologist Doug Wiebe glimpsed two small all-white birds outside Van Pelt Library that turned out to be albino house sparrows. Their coloration is likely the result of a genetic condition in which a bird’s feathers lack pigment.

Outdoors Varied sparrows species live in Southern Illinois

Rare Bird Alert: March 28, 2014 « ABA Blog

White Crowned Sparrow Birds of Pennsylvania

Birding: Unusual winter, unusual sightings

ABA Rare Bird Alert - American Birding Association

What should I do to report a rare bird?

Rare bird: 'Half-male, half-female' cardinal snapped in Pennsylvania

17 Sparrow Bird Types That You Should Know - Birds and Blooms

Song Sparrow Sings the Pacific Ocean – Kingfisher Journey- Marina

Rare half-male, half-female cardinal spotted in Pennsylvania

Earlier this year, Penn - University of Pennsylvania

Campus & Community

Warren Birds of Pennsylvania 1890 2nd Ed Chromolithograph wild

Outdoors Varied sparrows species live in Southern Illinois

Where's Wildlife Backyard Birds of Pennsylvania Poster