Barn Swallow | Audubon Field Guide
Resident parasites influence appearance, evolution of barn swallows | CU Boulder Today | University of Colorado Boulder
Tree Swallow (Tachycineta bicolor)
Learning from temperature-sensitive bird species
Collapse of desert bird populations likely due to heat stress from climate change, #conservation #ornithology news via @RareBirdAlertUK
ADW: Hirundo rustica: INFORMATION
Rainy Springs Bring Disaster for Nesting Tree Swallows | Blog | Nature | PBS
Barn Swallow | Audubon Field Guide
Swallows no longer migrating the 6,000 miles to South Africa and are staying in Britain over winter | Daily Mail Online
Variation in wing shape among female barn swallows. The three images... | Download Scientific Diagram
Resident parasites influence appearance, evolution of barn swallows | CU Boulder Today | University of Colorado Boulder
Shiver, Fluff and Cuddle: How Birds Keep Warm in the Winter | Chicago News | WTTW
Hinterland Who's Who - Barn Swallow
What Are the Different Types of Swallow Birds? - With Photos!
Photos - Barn Swallow - Hirundo rustica - Birds of the World
Swallow - Wikipedia
Welcome swallow - Wikipedia
Barn swallow - Wikipedia
Friday Feathered Feature — Madison Audubon
Photos - Barn Swallow - Hirundo rustica - Birds of the World
Friday Feathered Feature — Madison Audubon
Barn Swallow | Audubon Field Guide
ENJOYING NATURE: How to distinguish between our swallows | Glade Sun | crossville-chronicle.com
Barn Swallow | Audubon Field Guide
Barn Swallow | Celebrate Urban Birds
