flightless

The penguin is a flightless bird.

企鹅不会飞鸟。

Hesperornis is an extinct genus of flightless aquatic birds that lived during the Late Cretaceous.

黄昏鸟已经灭绝不会飞翔水鸟，生活在白垩纪晚期。

In some species, such as aphids, the flightless morph lacks wings and is called the apterous morph.

些昆虫类，如蚜虫，出现无翅个体，被称为无翅型。