一些迁徙的水鸟，如斑头雁和红麻鸭，会涌进卡兹兰加的湿地，与这里的斑嘴鹈鹕和黑颈鹤等常驻鸟类一起度过整个冬季；

Migratory waterbirds, from bar-headed geese to ruddy shelducks, crowd into Kaziranga wetlands over the winter with spot-billed pelicans and black-necked storks.

请说明鹈鹕钩的用法。

Please explain the use of the pelican hook.

体色青白或微红，有斑（普通斑、虎斑等）或无斑（白蚕）。

Pale reddish or body color, speckled, (normal spot, tiger spot etc) or no spot (white silkworm).

在这两张照片中，眉斑看来皆往前延伸到嘴喙的基部，这点便和极北柳莺不同。

In both photos, the supercilium appears to reach the bill base, pointing away from Arctic.

这个有趣的空腔能帮助鹈鹕捕捉鱼。

This funny pouch helps the pelican to trap fish.