Term fauna indicates all the present animal kinds in a geographical space or a determined ecosystem (in contrast with the flora), in given epoch. In general, notion does not consist of the man, although in a sense they can consider it as being part of animal reign, in the fact that it is physiologically classified as a mammal, notably by Darwin. (Wikipedia)

Spiders and Spiders (order Araneae) are predatory invertebrate arthropod class Arachnida. They have eight legs and have neither wings nor antennae or masticatory patches in the mouth. Their eyes may be single or multiple. They secrete silk (a protein solution synthesized by glands usually located at the end of the abdomen) that is used to produce the thread that allows them to move, to weave their webs or cocoons trapping prey or protecting their eggs or young, or to make a provisional reservation sperm or dome allowing them to store air in fresh water. (Wikipedia)

That they are young or old, nice or ungrateful, they form the originality of our world