Yes, those flappy bits at the back.

对啊，就是后边垂下的两片。

Bichirs too can make flappy forays over land, but they walk in a very different way.

Bichirs 也可以在陆地上进行轻快的尝试，但它们的行走方式却截然不同。

Four legs, a long, scaly tail, and flappy wings that looked way too large for its body.

四条腿，一条长长的鳞片状尾巴， 以及拍打着的翅膀， 看起来对它的身体来说太大了。

But over time, the butterfly's eyes get bigger and more complex, it grows antenna, its body shape changes, and of course, those proto wings-grow into their full, flappy splendor.

但是随着时间的推移，蝴蝶的眼睛变得越来越大，越来越复杂，它长出了触角，它的体型发生了变化，当然，那些原始的翅膀——长成了它们完整、轻盈的光彩。