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.

5 PROVEN Ways to STOP House Sparrows at Your Feeders! - Bird

Dark-Eyed Junco National Geographic

Campus & Community

White Crowned Sparrow Birds of Pennsylvania

Rare painted bunting draws bird lovers to Bartram's Garden in

Another rare bird appears at central Pa. wildlife area, part of 'mind

chipping sparrow with snow white head - FeederWatch

Endangered birds and quirky lists

Earlier this year, Penn - University of Pennsylvania

Libraries Penn Today

NH could lose purple finch amid dramatic bird population decline

Field Identification of Subspecies - American Birding Association

Campus & Community

Nelson's Sparrows - PSU Fall Banding by Alex Lamoreaux

A flying squirrel, a tiny insect eater and 19 other rare animals