Fleas are holometabolous.

Sea lampreys have a very characteristic life cycle. Freshly spawned fish remain in their larval stage - ammocoetes - for several years. During this ti ...

Leeches, being eurytopic animals, are common on almost every continent. Although they usually lead a parasitic or predatory life, they have been used ...

They are known for their distinctive mating song, which resounds with the familiar "cuckoo" repeated in two or three syllables. Another interesting fe ...

The variety of insects is enormous. There are those whose sizes are given in micrometers and whose body length is greater than that of dogs or cats. B ...