如今在这个国家，这种鸟已罕见了。

The bird is now a rare sight in this country.

这种鸟的数量在逐年减少。

This species of bird is decreasing in numbers every year.

成群的鸟聚集在湖边。

Huge numbers of birds had flocked together by the lake.

蓝鸟队有机会囊括这一系列比赛的冠军。

The Blue Jays have a chance to sweep the series.

杜鹃在其他鸟的巢中产蛋。

The cuckoo lays its eggs in other birds' nests.

许多笼中鸟比野外同类鸟的寿命长。

Many caged birds live longer than their fellows in the wild.

鸟利用暖气流助飞。

Birds use warm air currents to help their flight.

鸟振翅飞走了。

With a flap of its wings, the bird was gone.

母鸟抖开羽毛孵蛋。

The female sat on the eggs, fluffing out her feathers.

一只知更鸟在地上啄食面包渣。

A robin was pecking at crumbs on the ground.

这种鸟白天不常见。

You don't often see this bird in daytime.

现已发现这种鸟栖息在70多个不同的地区。

The birds are found in over 70 different localities.

这只鸟养得太温驯了，现在很难在野生环境中生存。

The bird is too tame now to survive in the wild.