Nocturnal Birds: Birds That Hunt, Call, Migrate, And Move After Dark
Nocturnal birds are birds that are active mainly at night. They are not one family or one order; nocturnality appears in many bird lineages, including owls, nightjars, potoos, kiwis, oilbirds, some rails, and many migrating songbirds during travel nights.
What Nocturnal Birds Are
Nocturnal birds are birds that do much of their feeding, calling, moving, or migrating after dark. This is an activity pattern, not a branch on the bird family tree.
Cornell Lab materials note that nocturnal birds such as owls are more active at night, while many other birds sleep at night or migrate during darkness.
Examples Of Nocturnal Birds
Owls are the best-known nocturnal birds, with many species using large eyes, strong hearing, soft-edged feathers, and silent flight to hunt in low light.
Nightjars and nighthawks feed on flying insects. Potoos use camouflage and stillness. Kiwis forage at night with strong smell and touch. Oilbirds navigate caves and nocturnal foraging routes.
Nocturnal, Crepuscular, And Night-Migrating
Nocturnal birds are mainly active at night. Crepuscular birds are most active around dawn and dusk. Some species shift between these patterns depending on season, weather, moonlight, food, and disturbance.
Many birds that feed by day migrate at night. Cornell Lab research on night-flying birds shows how much movement can happen overhead while people are asleep.
Adaptations
Nocturnal bird adaptations vary by group. Owls often combine vision, hearing, silent flight, and grasping feet. Nightjars use wide mouths and camouflage. Some nocturnal insect-eaters, such as poorwills, can use torpor when food is scarce or nights are cold.
Nocturnal life is not just about seeing in the dark. Sound, smell, touch, memory, flight style, feather texture, and timing all matter.
Threats
Artificial light at night can disrupt nocturnal behavior and night migration. Bright buildings, towers, and skyglow can increase collision risk, especially during migration.
Other threats include habitat loss, pesticide-driven insect decline, vehicle strikes, window collisions, outdoor cats, disturbance at roosts and nests, and repeated playback of calls near sensitive birds.
How People Can Help
Use less light at night, shield outdoor fixtures, choose warm low-intensity bulbs, and turn off unnecessary lights during migration. Keep cats indoors and make windows bird-safe.
When birding at night, use red or low light only when needed, keep distance from calling birds, and avoid repeated call playback that can pull birds away from normal behavior.