The question asked: how do birds migrate, and can all species and their routes be listed? Short answer to the second part: no — roughly half of the world's nearly 10,000 known bird species migrate, routes differ by population, age, season and year, and many are still unmapped. What follows is a sourced representative catalogue: 25 species or named taxa with a substantiated origin and destination, four major broad flyway corridors, and 12 sourced mechanism statements, from a live web scan of BirdLife, CMS/AEWA, Cornell, Audubon, Smithsonian and NPS sources on 29 August 2026. Positions on the map are broad regional bands, not tracked coordinates.
Endpoints are approximated to the centre of the stated region where sources gave no coordinates; a flyway is a broad corridor holding many variable individual routes, not a single aerial highway.
Lengthening or shortening days, internal biological clocks and hormones, temperature and local weather trigger departure; caged migrants show Zugunruhe — migratory restlessness — each spring and autumn. Tagged bar-tailed godwits were even shown to read Pacific wind regimes when deciding when and where to fly.
Sources: nationalgeographic.com · audubon.org · nps.gov · nationalgeographic.com
Birds carry redundant compasses: Earth's magnetic field, the sun, the rotation of the night sky around the North Star, the moon, polarized-light cues, landscape features, wind and weather, plus nocturnal flight calls. Inherited programs matter too — hummingbirds retrace the same paths with high fidelity without ever learning the route from parents.
Sources: audubon.org · nationalgeographic.com · audubon.org · nps.gov
Before departure birds gorge (hyperphagia), pack on fat and build flight muscle; in flight their physiology constantly burns and replenishes reserves while managing water balance and body temperature. Staging sites like Koshi Tappu below the Himalayas serve as refuelling stations, and many small birds fly at night to dodge predators and save energy.
Sources: academy.allaboutbirds.org · birdlife.org · audubon.org · nationalgeographic.com
Movement styles named across these sources: long-distance, short-distance, partial, altitudinal, loop, nomadic and irruptive migration.
Species counts are maximum web-source claims and are not comparable — scope and definitions differ by organization. These four do not exhaust global classification schemes: within North America, Atlantic, Mississippi, Central and Pacific are commonly used administrative flyways, while global conservation programs aggregate corridors differently.
| Species | Breeding / origin | Non-breeding destination | Route or flyway | Stated distance | Type | Mentions | Source |
|---|
Blank cells mean the source did not state it — left unknown rather than invented. Distance strings mix kilometres and one source-stated miles value (Kirtland's warbler), kept as written, not converted.
Method: live web research on 2026-08-29. Eight broad searches across BirdLife, CMS/AEWA, Cornell Lab, Audubon, Smithsonian, NPS and related authoritative sources yielded hundreds of candidate extracts; the cleaned catalogue keeps only the 25 cases with both an origin and a destination and removes two reversed-direction extraction errors. Mentions = number of scanned web sources supporting the row. Limitations: no static source lists every migratory species with one definitive route; taxonomy and populations change; some rows name groups or plurals or omit scientific names; many routes are population-specific. Cut for space: raw evidence excerpts behind the 15 mechanism source pages.