birder猎鸟者；（在野外栖息地）观察和研究鸟类的人birdn.鸟；禽Bird And Environment浅谈鸟类与环境Bird-Insect Script鸟虫书bird strike aircraft乌击航空器bird rs nest disease雀巢病bird rs eye view map鸟瞰图bird's-eye diamondβ断裂birds feathering out正在长羽毛的鸟bird-head dwarfism鸟头侏儒症, 小头侏儒Bird Avoidance Model飞禽回避模型bird influenza virus禽流感病毒