ABSTRACT
Brush-grasslands are mixtures of grasses, forbs, cacti, and thorny shrubs. The general habitat configuration is similar throughout the region, but the species and relative abundances of the plants vary with soil type, precipitation, and previous land history on both local and geographic scales. Careful observation and notation of simultaneous detections and relevant behavior are also important, especially for the monomorphic species which are the bulk of the brush-grasslands species. The variable transect method, though used for winter birds in this habitat, could be applied perhaps more easily in summer when there are fewer species involved and they are more conspicuous. The birds are a mixture of desert, grassland, shrubland, and eastern forest-edge species. Most are passerines and are reasonably easy to census due to conspicuous nests, behavior, songs, and territorial tendencies.
