Dorsal plumage on adults is a metallic blue-black with a pale beige/russet breast, chin and bib. The long, deeply-forked tail feathers are a key feature to identify this species from other swallows. Males and females are similar in appearance, though males are more vibrantly colored and have longer outermost tail feathers (retrices), with white spots (lacking in females). Males with the longest outermost tail feathers tend to be more successful at securing mates and have higher survival rates. The only member of the genus Hirundo in BC, Canadian Breeding Bird Survey data suggests Barn Swallow have experienced a 2.9% annual decline over the past 30 years, a decline that has steepened in the last decade to 7.6% annually.