How a group of picky females created the beautiful and bizarre males of the Paradisaeadie family.

From dancing spiders to drumming monkeys, discover what males will do to show they have what it takes! Watch the full episode online.

The answers to the age-old question, "What do women want?" just might be found in the animal kingdom. Watch the full episode online.

(Airs Sunday, March 21) Apparently, there is nothing a male will not do for the right to mate with a female -- dance, sing, fight, illuminate, even agree to be eaten alive.

(Airs Sunday, March 14) In the mating game, it is not always "do or die," but the penalties can be severe, and there is no tried and true approach when it comes to attracting a mate.