| BIR | any of several small-fruited cherry trees frequented or fed on by birds |
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| BIR | any of several small-fruited cherry trees frequented or fed on by birds |
| BIR | a gun dog trained to locate or retrieve birds |
| BIR | a family of warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings |
| BIR | a person have a strong interest in birds |
| BIR | seeds for birds |
| BIR | a genus of birds |
| BIR | wingless insect with mouth parts adapted for biting |
| BIR | any of various large keen-sighted diurnal birds of prey noted for their broad wings and strong soaring flight |
| BIR | very large terrestrial southeast Asian pheasant often raised as an ornamental bird |
| BIR | nocturnal bird of prey with hawk-like beak and claws and large head with front-facing eyes |
| BIR | nocturnal bird of prey with hawk-like beak and claws and large head with front-facing eyes |