flightless

The penguin is a flightless bird.

企鹅是种不会飞的鸟。

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

黄昏鸟是种已经灭绝的不会飞翔的水鸟，生活在白垩纪晚。

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

昆虫种类，如蚜虫，出现无翅个体，被称为无翅型。