Fig. 3. Maximum likelihood fits of models MLOGISTICshown as a dotted line and MASYMP, a solid line to Tucson Bird Count data for Gambelís Quail (GAQU) response to local desertscrub cover, i.e., proportion of desertscrub cover within 56 m. Open circles: average observed GAQU occurrence in bins of 30 sites having adjacent desertscrub cover values.