| interspecific differences in hematozoan infection in sonoran desert aimophila sparrows. | numerous studies have identified factors that control avian hematozoan infections, but the mechanisms that account for host differences in parasitemia remain largely speculative. to address this issue, we compared the prevalence of these parasites in stained blood smears from four conspecific sonoran desert aimophila sparrow species sampled during their breeding season: rufous-winged (aimophila carpalis; rwsp), rufous-crowned (aimophila ruficeps; rcsp), cassin's (aimophila cassinii, casp), and b ... | 2005 | 16244063 |