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.

Where's Wildlife Backyard Birds of Pennsylvania Poster

One-in-a-million bird: Combo male-female grosbeak netted at

Campus & Community

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

Libraries Penn Today

Researchers Spot Half-Male Half-Female Bird At Pennsylvania Reserve

Folks flock to Maryland for rare sighting of bird that looks like

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

Endangered birds and quirky lists