The family Hirundinidae, commonly known as swallows and martins, includes small, agile birds known for their graceful flight. They are characterized by their pointed wings, forked tails, and streamlined bodies, which help them catch insects in mid-air. Swallows are found worldwide, except in extreme desert and polar regions, and they often build nests in sheltered locations. Hirundinidae species are social birds, often seen in flocks, especially during migration. They are known for their long-distance travel, with some species migrating thousands of miles between breeding and wintering grounds. Their diet primarily consists of flying insects, making them beneficial for controlling pest populations.