These coordinated movements of a flock of starlings follow no plan or leader. Scientists used to think the animals must ...

It is often heard in flight, giving distinct flight calls ... The male is unlike any other finch in North America; the Wilson’s warbler is the only other bright yellow species with a black ...

But of course birds in flight leave no trace—at least none visible to the naked eye. Bou, now 38, spent the past five years trying to capture the elusive contours drawn by birds in motion ...