Male guppies are brightly colored in shades of black, green, orange, red, white, and yellow and have patterns ... maturity at two months old, while female guppies reach sexual maturity at three ...

though it could have become redder or more yellow. Why has it stayed the same hue of orange over such a long period of time? Because that's the color female guppies prefer. "Sometimes populations ...

The first pigments are carotenoids, which are yellow and aren’t produced by ... and they quickly discovered that female guppies are drawn strongly to males with intermediate levels of ...

The "flashier" a male guppy is, the more likely a female guppy will choose him as a mate, giving him the opportunity to pass his genes along to the next generation. This is sexual selection at ...

TALLAHASSEE, Fla. -- When it comes to choosing a mate, female guppies often go for the mates with the flashiest, most interesting color patterns. But why is that? Turns out, it's all about psychology.

For female guppies, there’s more to life than making babies. A new study finds that guppies experience menopause just like humans and other animals. The study is the first demonstration of ...

To test the idea, researchers used female guppies bred for either a larger or smaller brain. Guppy brains are tiny to begin with, but after five generations of breeding the brain sizes in the ...

Female birds do it, female bees do it, even female guppies in the (freshwater) seas do it. Choices by females often play the deciding role in mating behavior: Bronze-winged jacanas keep male ...