Daniel J. Field:
Tree Swallow (Tachycineta bicolor), Litchfield, Connecticut
Daniel J. Field:
White-winged Swallow (Tachycineta albiventer)
Daniel J. Field:
Black Saw-wing (Psalidoprocne prisoptera), Echuya Forest Reserve, Uganda
Daniel J. Field:
Barn Swallow (Hirundo rustica), Hortobágy, Hungary
Daniel J. Field:
Violet-green Swallow (Tachycineta thalassina), Colony Farm, Coquitlam, British Columbia
Daniel J. Field:
Tree Swallow (Tachycineta bicolor), Colony Farm, Coquitlam, British Columbia
Daniel J. Field:
Tree Swallow (Tachycineta bicolor), Point Pelee National Park, Ontario
Daniel J. Field:
Tree Swallow (Tachycineta bicolor), Colony Farm, Coquitlam, British Columbia
Daniel J. Field:
Sharing a perch: House Finch (Haemorhous mexicanus) and Purple Martin (Progne subis), Milford Point, Connecticut
Daniel J. Field:
Barn Swallow (Hirundo rustica), Wicken Fen, Cambridgeshire, United Kingdom
Daniel J. Field:
Blue-and-white Swallow (Notiochelidon cyanoleuca), Serra da Canastra, Minas Gerais, Brazil
Daniel J. Field:
Common House-Martin (Delichon urbicum), Babraham, Cambridgeshire, United Kingdom
Daniel J. Field:
Common House-Martin (Delichon urbicum), Babraham, Cambridgeshire, United Kingdom
Daniel J. Field:
Bank Swallow aka Sand Martin (Riparia riparia), Minsmere, Suffolk, United Kingdom
Daniel J. Field:
Bank Swallow aka Sand Martin (Riparia riparia), Minsmere, Suffolk, United Kingdom
Daniel J. Field:
White-winged Swallow (Tachycineta albiventer), Pouso Alegre, Mato Grosso, Brazil
Daniel J. Field:
Bank Swallow aka Sand Martin (Riparia riparia), Essex, United Kingdom
Daniel J. Field:
Bank Swallow aka Sand Martin (Riparia riparia), Essex, United Kingdom
Daniel J. Field:
Bank Swallow aka Sand Martin (Riparia riparia), Essex, United Kingdom
Daniel J. Field:
Bank Swallow aka Sand Martin (Riparia riparia), Essex, United Kingdom
Daniel J. Field:
Northern Rough-winged Swallow (Stelgidopteryx serripennis), Toronto, Ontario, Canada
Daniel J. Field:
Barn Swallows (Hirundo rustica), Toronto, Ontario, Canada
Daniel J. Field:
Barn Swallow (Hirundo rustica), Toronto, Ontario, Canada
Daniel J. Field:
Purple Martin (Progne subis), Calgary, Alberta, Canada
Daniel J. Field:
Mangrove Swallow (Tachycineta albilinea), Felipe Carillo Puerto, Quintana Roo, Mexico
Daniel J. Field:
Mangrove Swallow (Tachycineta albilinea), Emberá, Panama
Daniel J. Field:
Bank Swallow (Riparia riparia), Calgary, Alberta
Daniel J. Field:
Tree Swallow (Tachycineta bicolor), Calgary, Alberta, Canada
Daniel J. Field:
Welcome Swallow (Hirundo neoxena), Kuranda, Queensland, Australia
Daniel J. Field:
Welcome Swallow (Hirundo neoxena), Cairns, Queensland, Australia
