identification, antimicrobial resistance profiles, and virulence of members from the family enterobacteriaceae from the feces of yellow-headed blackbirds (xanthocephalus xanthocephalus) in north dakota.public pressure to reduce or eliminate antimicrobials as ingredients of feed for poultry and other agricultural animals is mounting, primarily due to the fear of multidrug-resistant bacteria in clinical infections in both animals and humans. exploration of the occurrence of antibiotic resistance in the gut flora of wildlife avian flocks that presumptively do not receive antimicrobials will determine the rate of resistance in a naïve population. fecal samples collected from a healthy population o ...200717992921
further investigations of the mite genus syringophiloidus kethley, 1970 (acariformes: syringophilidae) from north american passerines.four new syringophilid species of syringophiloidus kethley, 1970 are described from north american passerines: s. zonotrichia n. sp. from zonotrichia albicolis (gmelin) (emberizidae) on texas; s. jackowiaki n. sp. from poecile carolinensis (auduborn) (paridae) in texas; and s. xanthocephalus n. sp. from xanthocephalus xanthocephalus (bonaparte) (icteridae) and s. agelaius n. sp. from agelaius phoeniceus linnaeus (icteridae), both from arizona. spizella breweri (cassin) (emberizidae) from califor ...201121643897
a review of the zumpti species group of the genus harpyrhynchoides (acariformes: harpirhynchidae)--ectoparasites of passerines.the zumpti species group of the genus harpyrhynchoides (harpirhynchidae), parasites of passerines, is revised. a key to the species of this group is provided and data on host associations and geographic distribution of its constituent species are summarized. this group includes six previously recognized species: harpyrhynchoides alaudinus bochkov, 2000, h. brevis (ewing, 1911) comb. nov., h. heatherae bochkov and galloway, 2013, h. rubeculinus (cherny and sixl, 1971), h. vulgaris bochkov and gal ...201425543798
benefits of begging for yellow-headed blackbird nestlings.for begging to benefit chicks, parents must respond to increased begging by bringing more food. to investigate whether parents change their provisioning in response to begging levels, i enhanced the begging levels of broods of yellow-headed blackbirds, xanthocephalus xanthocephalus, using recorded vocalizations. in a short-term experiment, females and males doubled their visits to broods without reducing their load sizes during 2 h of playback. nestlings gained more mass during the playback peri ...19989784205
habitat selection by dispersing yellow-headed blackbirds: evidence of prospecting and the use of public migratory birds individuals may prospect for potential breeding sites months before they attempt to breed and should use the cues most predictive of future reproductive success when selecting a breeding site. however, what cues individuals use when prospecting and which cues are used in selecting a breeding site are unknown for most species. i investigated whether yellow-headed blackbirds (xanthocephalus xanthocephalus) prospect for future breeding sites and whether they select breeding habit ...200516007408
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