Later experiments, in which young birds viewed a planetarium sky rotating around the star Betelgeuse, found that the birds learned this star, and not Polaris, as their true North.

If Birds Left Tracks in the Sky, They’d Look Like This. ... But of course birds in flight leave no trace—at least none visible to the naked eye. Bou, now 38, ...

A Bird’s-Eye View of a Technicolor World. ... Humans can’t see ultraviolet light, but many birds can. “Their sky will be essentially an ultraviolet sky,” said Daniel Hanley, ...

The Shrike prototype merges machine-learning threat recognition and location capability with off-the-shelf unmanned aerial systems to augment artillery forward observation.