The timing of migration seems to be controlled primarily by changes in day length. Migrating birds navigate using celestial cues from the sun and stars, the earth's magnetic field, and probably also mental maps.
The timing of migration seems to be controlled primarily by changes in day length . Migrating birds navigate using celestial cues from the sun and stars , the earth 's magnetic field , and probably also mental maps .
How do migrating birds navigate?
How do migrating birds navigate ?
celestial cues from the sun and stars
celestial cues from the sun and stars