Mayhew 1960 April 30 Journal 31. Colorado Desert, Imperial Co., Calif. Callisaurus macrurus Goniosphorus tigris Uta stansburiana Crotaphytus wicklani No muskrats were seen at San Felipe Creek but their burrows were seen and one complete skull was found beside the stream. More water was flowing in both Carrizo & San Felipe Creeks than I have seen for some time. The water was quite clear, so it isn't likely to have been storm run-off. We returned to the cars at 1100, then left the area. We spent a couple of hours (from 1345 to 1550) at Bower Lake, north of Brawley, watching birds. Those seen at this location were: yellow-headed blackbird Red-winged blackbird Horse sparrow Black tern Coot Sulfur-billed gull Barn swallow Rough-winged swallow Common gallinule Fulvous tree duck Eared grebe Pied-billed grebe Western grebe Ruddy duck Ring-billed gull Black-necked stilt Cinnamon teal Verrdin Scott's oriole Avocet White-winged dove Blue grosbeak Hudsonian curlew Cliff swallow Western kingbird Lopsided shrike