EL Kalstein 1956 Hyla crucifer April 23 mouth of Tahquitz Canyon near Palm Springs, Riverside Co., Calif. 9:40 p.m. my first encounter with this species. Chorus heard from about 250 yards from our camping site outside of Palm Springs. Warm, still, moon-lit night (full moon). The stream tumbles out here into numerous pools to 3-4 feet depth. Adult calling from mud banks, 3 miles from still water edged pool 8 x 16 feet. Hyla fresh water. A smallish mottled grayish hylid which gave a good bright eye-shine in my head lamp. Air temp. 20.3° at 9:46 p.m. Water 1" beneath surface 17.5°C. Call a short inflected rasping blast and each lasting about ½ second. More of a "whining" tone than Hyla and uniform in trial quality. From a distant male it sounds more like a short squawk. Different pitches from different individuals. One may call repeatedly, about 12 calls in 10 seconds and then be silent another 15 seconds before beginning again. Another variant is a lower br-a-a-a-a which sounds like the frog is not warmed up. Favorite calling station appears to be stream mud banks, forcing water. Escape by diving into pool and swimming quickly to bottom and then to edge of pool. 3 miles calling from margins of a deep pool, artificially dammed up for a swimming hole. Pool 40 feet across, probably 5 feet deep middle. One pair incomplete. I sought to escape into bushes. It's better cover of overhanging bushes to large extent. Hardly captured about six.