Two new studies into lizard colors reveal how one species maintains its colorful diversity while others are losing their ...

Researchers have found that ants have a particular preference for aphid colonies with certain colors, which could be why these bugs are able to keep their colors across generations. Aphids are tiny ...

This study examined the reproductive consequences of a discrete flower color polymorphism in a natural population of the woodland herb, Hydrophyllum appendiculatum (Hydrophyllaceae). Approximately 3% ...

Female adult Common Cuckoos appear in two color morphs, shown here as half of the rufous (hepatic) form (left) and half of the gray morph (male-like, right). Several species of cuckoos, a genus of ...

When selection acts on social or behavioral traits, the fitness of an individual depends on the phenotypes of its competitors. Here, we describe methods and statistical inference for measuring natural ...

Aphids are tiny bugs that live in large colonies and suck sap from plants, producing a sugar-rich substance called honeydew, which is then eaten by ants. Ants, in turn, protect aphids - in a mutually ...