求翻译：美洲鹤曾经在北美洲大陆广泛分布，但是，随着欧洲移民蜂涌地进入北美洲，大量的猎捕、拾卵及破坏栖息地，使其从它们的繁殖地上逐渐消失。19世纪末以后，美洲鹤的生存环境更是每况愈下，湿地的水被排干，改作农耕地以及人们居住的城市，猎杀美洲鹤的事情也常常发生。到了1941年，越冬的美洲鹤群体只剩下了16只，成为世界上最濒危的鹤类。是什么意思？

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american crane was once widely distributed in North America Continent, however, as the European immigrants flocking to North America, and the large number of hunting, collecting eggs and destruction of habitats, from their breeding ground is gradually disappearing. After the 19th century, American c

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American crane had widely distributed in continental North America, however, as European settlers poured into the North America, a large number of Hunt, collect eggs and destruction of habitats, making it gradually disappeared from their breeding ground. After the end of the 19th century, the Americ