在圣盖博山的熊分水岭，白天迁徙时观察到 20,000 只鸟。 20,000 birds observed during daylight migration at Bear Divide in the San Gabriel Mountains.
在洛杉矶附近的熊分水岭，一条独特的小径见证了罕见的白天鸟类迁徙奇观。 At Bear Divide near LA, a unique trail witnesses a rare spectacle of daylight bird migration. 该地点位于圣盖博山，是美国西部少数几个可以在白天观察鸟类迁徙的地方之一。 This site, in the San Gabriel Mountains, is one of the few places in the western U.S. where bird migration can be observed during daylight hours. 鸟儿通过熊分水岭的通道聚集，研究人员可以在它们低空飞行时识别、捕捉并研究它们。 Birds are funneled through the passageway at Bear Divide, allowing researchers to identify, catch, and study them as they fly low. 在特殊的日子里，可以看到多达 20,000 只鸟飞过。 On exceptional days, up to 20,000 birds can be seen passing by.