| HIR | excessive hairiness |
|---|---|
| HIR | hermaphroditic aquatic or terrestrial or parasitic annelids |
| HIR | carnivorous or bloodsucking aquatic or terrestrial worms typically having a sucker at each end |
| HIR | a family of Hirudinea |
| HIR | type genus of the family Hirudinidae |
| HIR | large European freshwater leech formerly used for bloodletting |
| HIR | swallows and martins |
| HIR | type genus of the Hirundinidae |
| HIR | of Australia and Polynesia |
| HIR | North American swallow that lives in colonies and builds bottle-shaped mud nests on cliffs and walls |
| HIR | common swallow of North America and Europe that nests in barns etc. |