| BIR | cliff brake of California and Baja California having purple-brown leafstalks |
|---|---|
| BIR | common violet of the eastern United States with large pale blue or purple flowers resembling pansies |
| BIR | any of various fungi of the family Nidulariaceae having a cup-shaped body containing several egg-shaped structure enclosing the spores |
| BIR | any of numerous carnivorous dinosaurs of the Triassic to Cretaceous with short forelimbs that walked or ran on strong hind legs |
| BIR | common trailing perennial milkwort of eastern North America having leaves like wintergreen and usually rosy-purple flowers with winged sepals |
| BIR | an effigy in the shape of a man to frighten birds away from seeds |
| BIR | an ornamental basin (usually in a garden) for birds to bathe in |
| BIR | a person with confused ideas |
| BIR | a cage in which a bird is kept |
| BIR | a catcher's mask with a strong wire face |
| BIR | a device for imitating a birdcall |
| BIR | the characteristic sound produced by a bird |