What do you feed an adult barn swallow?

Adult barn swallows primarily feed on insects, such as flies, beetles, and mosquitoes, which they catch in flight. They typically hunt in open areas or near water sources. Providing a habitat with abundant flying insects, such as maintaining a natural garden or minimizing pesticide use, can support their feeding needs. Additionally, during migration, they may also consume small amounts of fruit or nectar if insects are scarce.