There are about 89 species in the Hirundinidae family, which includes swallows and martins. Members of this family are found on every continent except Antarctica.
They have short, wide bills, short legs, and small, weak feet. Their bodies are slender, with long, pointed wings that make them excellent fliers.
Many species have long, forked tails and glossy upperparts with a metallic sheen that contrasts with their paler undersides.
Most species measure between four and nine inches (10–23 cm) in length. In many species, males and females look similar.
Swallows and martins feed primarily on insects, which they catch in flight. Some species, such as the barn swallow, have adapted well to living alongside humans and often build their nests in barns and other structures.
Most species are social and gather in flocks, and all swallow and martin species that breed in North America migrate south for the winter.
Status and range is taken from IUCN Redlist
Status taken from NH Fish and Game
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