melanic

The melanic and nonmelanic ladybugs each mimic a different species of beetle which is very poisonous to birds, he says.

黑色的和非黑色的瓢虫都各自模拟不同种类的甲虫，这类甲虫对鸟类来说是有毒的。“ 他说。

Some species of cat regularly produce melanic forms-the so-called black panther (actually a melanic jaguar) being the most familiar.

某些品种的猫科动物有规律地产生“黑化”现象——其中所谓的黑豹(确切地说，是黑化的美洲豹)是最为常见的。

Melanic forms, though, are particularly prevalent in species with complicated lives—those that inhabit a range of habitats, are active both day and night, and move between the ground and the trees.

可是，黑色外表为各种复杂形式的物种所有，它们栖息在不同地带、有白天活动的也有黑夜活动的、有在地面生存的也有在树上生存的。