Barn swallow

The barn swallow (Hirundo rustica) is a widespread migratory songbird distinguished by its deeply forked tail and reddish throat. It catches flying insects on the wing and breeds across much of the Northern Hemisphere.

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Hirundinidae: Hirundinidae is the bird family of swallows and martins, adapted for sustained flight and catching insects in the air. The barn swallow belongs to this family of aerial insectivores.
Mud nest: A mud nest is a structure made from mud pellets, often reinforced with plant fibers and lined with softer material. Pairs build a cup-shaped nest from mud against a ledge or sheltered vertical surface.
Bird banding: Bird banding marks individual birds with numbered rings or tags to study movement, survival, and population trends. Banding records help reveal barn swallow migration routes and life spans.
Barn swallow migration: Barn swallow migration is the seasonal movement of regional populations between breeding areas and wintering grounds. Different populations follow distinct routes between northern breeding areas and wintering regions.
Avian migration: Avian migration is the regular seasonal movement of birds between breeding and nonbreeding areas. Seasonal journeys between northern breeding grounds and warmer wintering areas define its annual cycle.
Brood parasite: A brood parasite lays eggs in another individual's nest and relies on that host to raise its young. The brown-headed cowbird sometimes lays eggs in barn swallow nests.
Citizen science: Citizen science is research conducted partly or wholly by members of the public, often through structured observations. Volunteer sightings and nest counts help track this widely observed species.
Barn swallow subspecies: Barn swallow subspecies are geographically differentiated populations of Hirundo rustica recognized by variation in appearance and range. Regional forms vary in plumage and migration, including populations that winter on different continents.
Insectivore: An insectivore is an animal that feeds primarily on insects and other arthropods. Flying insects make up the barn swallow's principal food.
Stopover site: A stopover site is a place where migratory animals pause to rest and refuel during a journey. Swallows need insect-rich resting areas to replenish energy during migration.