| the guild structure of a community of predatory vertebrates in central chile. | the trophic ecology of eleven predator species (falconiforms: buteo polyosoma, elanus leucurus, falco sparverius, geranoaetus melanoleucus, parabuteo unicinctus; strigiforms: athene cunicularia, bubo virginianus, tyto alba; carnivores: dusicyon culpaeus; snakes: philodryas chamissonis, tachymenis peruviana) in two nearby localities of central chile is analyzed. the localities exhibit the typical climate (hot-dry summers, coldrainy winters), and vegetation (chaparral), of mediterranean ecosystems ... | 1981 | 28309444 |
| isotope variations in white-tailed kites from various habitats in california: possible limitations in assessing prey utilization and population dynamics. | white-tailed kite (elanus leucurus) populations in the 1930s were close to extirpation in the united states. but by the 1940s, an upward trend towards recovery was apparent and continued to their current stable population levels. these dramatic fluctuations in kite numbers may have been related to changes in rodent prey populations due to the conversion of native habitats to agriculture. to address this question, we evaluated the use of stable isotope analysis in determining if a shift in diet c ... | 2003 | 12872807 |
| habitat associations of small mammals in southern brazil and use of regurgitated pellets of birds of prey for inventorying a local fauna. | we inventoried terrestrial small mammals in an agricultural area in southern brazil by using trapping and prey consumed by barn owls (tyto alba) and white-tailed kites (elanus leucurus). small mammals were trapped in three habitat types: corn fields, uncultivated fields ("capoeiras"), and native forest fragments. a total of 1,975 small mammal specimens were trapped, another 2,062 identified from the diet of barn owls, and 2,066 from the diet of white-tailed kites. both trapping and prey in the p ... | 2007 | 18278312 |
| food partitioning between breeding white-tailed kites (elanus leucurus; aves; accipitridae) and barn owls (tyto alba; aves; tytonidae) in southern brazil. | i examined the diet of breeding white-tailed kites (elanus leucurus; aves; accipitridae) and barn owls (tyto alba; aves; tytonidae) in an agrarian area of southern brazil by analyzing regurgitated prey remains. the objective was to evaluate how these raptors, which differ markedly in their hunting activity periods (owls are nocturnal and kites diurnal), share their mammalian food component. 2,087 prey consumed by barn owls and 1,276 by white-tailed kites were identified. they presented a high ov ... | 2007 | 17505751 |