They are important and necessary feeding and breeding grounds for migratorybirds.
他们是候鸟必不可少的觅食和繁殖地,十分重要。
2
Some residents voiced concern that the rice could threaten certain species of rare migratorybirds.
一些居民担心这种大米会威胁到某些稀有候鸟的生存。
3
Early in his research, Kramer found that caged migratorybirds became very restless at about the time they would normally have begun migration in the wild.