Murray 1948 English Sparrow Apr 6 Calexico, Imperial Co., Calif. Mating procedure was taking place. A female was located on a small, low post in the center of a base lot. A male repeatedly flew up on top of her momentarily, then away to the ground or a nearby platform. Twice another male approached and he chased it away. His actions were repeated for several minutes and then he left. The female remained quiet at all times and did not leave until several minutes later. Yesterday a female was seen aggressively chasing over the ground in a park, once gripping it by the head feathers.