• Read more about Yellow-green Vireo

This vireo occurs in the mid to upper levels of open woodland and forest edge. The female constructs the cup-like nest out of bark and fine grass, and places it on a small branch in the middle to upper levels of a tall tree. Yellow-green Vireos eat insects gleaned from tree foliage, and they seem to prefer caterpillars and beetles. In the Fall and Winter they also eat berries, including mistletoes.

• Read more about White-throated Swift

Colonies of this swift are found flying in circling flocks high over head near cliffs, canyons and other vertical faces such as tall buildings. The White-throated Swifts can fly at incredibly fast speeds as they pursue insects in the air or in mating courtships. They roost at night clinging to vertical surfaces, and during cold nights, they can lower their body temperatures to reduce energy needs. The nest is glued to creviced rocks using saliva and feathers.

• Read more about Cactus Wren

Restricted to desert areas with catus and acacia, the Cactus Wren places it huge domed nest in the middle of the spiniest plant available. These nest are often also used for roosting during the winter. Insects make up only a part of this species\' diet, and fruit, seeds, berries and nectar make up the rest. Unlike many species, this wren maintains a defended territory all year round. It often enter suburbs and vegetated urban areas.