https://cdn.earthdata.nasa.gov/conduit/upload/5182/KeywordsCommunityGuide_Baseline_v1_SIGNED_FINAL.pdf 23.7 2026-04-15T10:53:30.610Z https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/sciencekeywords/1bf8f27a-d6ff-4cb6-acb7-7e5cce11e029 BIRDS Birds, of the class Aves, are warm-blooded craniates with a body coveringof feathers; typically with forelimbs modified as wings for active flight.They are free living (most can fly) in all terrestrial and surface waterhabitats; some are capable of swimming underwater.