For some fish and sea spider species, it's the male's duty to take care of the kids. The males dig a nest, then females come, put their eggs in and go away, never to come back. ( <img src="/ubbthreads/images/graemlins/badsmile2.gif" alt="" /> )
Wether fecundated or not, the eggs of the queen bee will give a baby: a female if fecundated; a male if not.
A mullet is the animal resulting of a horse and a donkey crossbreed. All male mullets are sterile, but females can reproduce with male horses or donkey. Because of that mullet are not an animal "specie".
Most birds's reproduction system and behavior is activated by the photoperiod (sunlight time in a day).
Some birds use the stars to direct themselves on their migration. They also use, among else, the magnetic field of the earth and the position of th sun.
<img src="/ubbthreads/images/graemlins/exclamation.gif" alt="" /> Adult facts <img src="/ubbthreads/images/graemlins/exclamation.gif" alt="" />: Whales have to be three to make love. They need a helper to maintain themselves stuck together. Dolphins are the only animals other than humans that make love just for fun. <img src="/ubbthreads/images/graemlins/winkwink.gif" alt="" />
