Two brightly colored sun conures relax on a branch at the Bramble Park Zoo in Watertown, South Dakota. These South American parakeets are common in captivity, but wild populations have crashed due to unregulated trapping.
Green Tree Frogs
In a nocturnal rendezvous, two green tree frogs meet face-to-face atop a leaf in Louisiana's Atchafalaya River Delta. Green may be the most common color found in nature—it's everywhere from leaves, grass, and moss to snakes, butterflies, and even the northern lights. Green represents life, vitality, nature, and, of course, environmentalism.
Eyelash Viper - Yellow Snake
Eyelash vipers are indigenous to Central and South America and come in a variety of colors, including shocking yellow, like this specimen.
A triplefin fish is nearly indistinguishable from the bright red sponge on which it rests. This shot was taken on the pristine reefs around the Tukangbesi Islands, protected by an Indonesian national marine park.
These distinctive webbed feet belong to a blue-footed booby of the Galápagos Islands. The bluer, the better: Courting males show off with a high-stepping strut—and those with brighter feet are more attractive to potential mates.