and should be learned well as a reference point for less common species. The larger California (commonly occurs alongside the ring-billed in the west) is a 4-cycle gull with a stouter bill and ...

Only about 500 California condors remain in the US south-west and Mexico. In the 1980s, fewer than two dozen birds remained in the wild, but conservation efforts have boosted their numbers in ...

This common desert woodpecker replaces ... hybridize at a few localities in southern California. Polytypic (about 8 ssp. in North and Middle America; birds north of Mexico are cactophilus).