# Birds

**IRI:** https://folio.openlegalstandard.org/R80ZEN9QYz3ntT0V4OTWJ6D

## Labels

**Preferred Label:** Avians

## Definition

Birds are a class of vertebrate animals characterized by feathers, beaks without teeth, and a high metabolic rate. Most birds are capable of flight, although some species are flightless, and they lay hard-shelled eggs, exhibit complex behaviors, and are found in a variety of environments worldwide.

## Sub Class Of

- https://folio.openlegalstandard.org/R8sd4v04cEXnzbttN2gUEpV

## Parent Class Of

- https://folio.openlegalstandard.org/R7xpf80TbUte15aQuYy4a12

**Deprecated:** False