The different groups of spiders have several copulation rituals which are very fascinating and worth observing. The laying of the eggs is for the females an essential activity. Even if they are not fertilized, the females shall, may it be later than normal, lay the eggs. Such non-fertilized eggs do not develop. As soon as the female comes to this conclusion, she leaves the eggs, which are often sucked empty before the definite separation.
Different species show remarkable care for their offspring.
Hunting-spiders, which make no webs, show on another manner a moving care for their eggs. They carry their egg-sack always with them, glued by means of silk to their spinnerets or between their jaws.