Jacanas are birds in which one female typically mates with several males. A female will lay eggs in the nests of each of several males, all of whom build these nests on the female's territory. In jacanas, females are larger and more brightly colored than males. Give a likely explanation for why females are larger and more brightly colored based on sexual selection. Male widowbirds have long tails.
Females mate preferentially with males with longer tails.
In a species of poison-dart frog that lives in tropical rainforests in Panama, after the female lays eggs and the male fertilizes the eggs, the male stays with the eggs and cares for them by keeping them free of mold. Actually, it turns out that both sexes are extremely brightly colored, but the reason has nothing to do with sexual selection. Male-male competition can occur in a variety of ways.