According to bird experts Kenn and Kimberly Kaufman, much about bird flying is dependent on the species, season, and what else the bird is doing. Songbirds that feed on insects vary in the elevation ...

Changes in the number, shape, efficiency and interconnectedness of organelles in the cells of flight muscles provide extra energy for birds’ continent-spanning feats. Weighing in at a single ounce, ...

High above us, the atmosphere is teeming with life. Birds, bats and insects share the airspace, but divide it into different ...

Bird migration trackers saw record-breaking traffic overnight on Oct. 8. See how many were in flight, and what's expected Oct ...