Animals

Pterodactyl is a common name referring to two genera of the pterosaur clade.

During breeding, the color of the gray heron's beak becomes more intense.

Most octopuses hatch from eggs as paralarvae and function as plankton for the first weeks or months. These small octopuses feed on zooplankton, arthropod larvae, or copepods.

Queen Alexandra's birdwing (Ornithoptera alexandrae) is a species of butterfly in the family Papilionidae. 

The nervous system of brittle stars has a simple structure.

It was first described in 1854 by zoologist Edward Blyth.

The wombat resembles a badger in appearance, with a uniform gray coat.

Until the early 20th century, platypuses were eagerly hunted for their fur.

Thanks to these properties of the saliva, leeches, especially the medicinal leech (Hirudo medicinalis), are used in hirudotherapy.

Their peculiar external appearance encourages the Malagasy people to consider them bad omens.