A desert area has many species of cactus and brush as well as birds, snakes, lizards, and rodents. This desert is an example of a what: climax community, pioneer species, disturbance, secondary succession.

The answer to the question is climax community. Once the vegetation in an area has reached a steady state, it can sustain a population of animals, creating a climax community, a collection of organisms that are sustainable and are best adapted to the average environment. In the case here, a desert composed of cactus and brush as well as birds, snakes, lizards, and rodents would definitely be considered a climax community to sustain all those species.