| decreasing prevalence and seasonal variation of gunshot trauma in raptors admitted to the wildlife center of virginia: 1993-2002. | a retrospective study was conducted to identify the epidemiologic factors associated with gunshot injuries in raptors presented to the wildlife center of virginia from 1993 to 2002. of the 3,156 raptors admitted, 118 raptors (3.7%), representing 15 species, were admitted with gunshot trauma as the primary cause of morbidity and mortality. the majority of cases consisted of four species: red-tailed hawk (buteo jamaicensis; 47%), red-shouldered hawk (buteo lineatus; 14%), turkey vulture (cathartes ... | 2005 | 17312769 |
| prevalence of encysted apicomplexans in muscles of raptors. | an acid-pepsin digestion technique was used to examine portions of breast muscle and heart from raptors for encysted protozoans. apicomplexan zoites were present in 52 (45.6%) of the 114 samples examined: 11 of 12 (91.7%) red-shouldered hawks (buteo lineatus), 20 of 34 (58.8%) red-tailed hawks (buteo jamaicensis), two of seven (28.6%) cooper's hawks (accipiter cooperi), three of four (75%) sharp-shinned hawks (accipiter striatus), one (100%) mississippi kites (ictinia misisippiensis), one of two ... | 1999 | 9950339 |
| a retrospective study of morbidity and mortality of raptors in florida: 1988-1994. | a retrospective study was conducted on 390 raptors admitted to the university of florida veterinary medical teaching hospital (vmth) during 1988-1994. representatives of 20 species were admitted; the five most common species were the barred owl (strix varia, 72), eastern sreech owl (otus asio, 63), red-shouldered hawk (buteo lineatus, 49), bald eagle (haleaeetus leucocephalus, 43), and red-tailed hawk (buteo jamaicensis, 38). a primary clinical diagnosis was determined in 340 (87%) of the 390 ra ... | 1998 | 9732030 |
| plasmodium forresteri n. sp., from raptors in florida and southern georgia: its distinction from plasmodium elongatum morphologically within and among host species and by vector susceptibility. | plasmodium forresteri n. sp. naturally infects eastern screech-owls (otus asio), great horned owls (bubo virginianus), barred owls (strix varia), bald eagles (haliaeetus leucocephalus), red-shouldered hawks (buteo lineatus), broad-winged hawks (buteo platypterus), and red-tailed hawks (buteo jamaicensis) in florida and southern georgia. schizonts occur in mature or nearly mature erythrocytes, produce 2-6 merozoites arranged most commonly in fan or cruciform configuration, with mean dimensions am ... | 1997 | 9379302 |
| prevalence of encysted toxoplasma gondii in raptors from alabama. | little is known about the prevalence of encysted toxoplasma gondii in wild birds. we examined the hearts and breast muscles from 101 raptors for encysted t. gondii. all of the raptors had been submitted for necropsy to the state veterinary diagnostic laboratory, auburn, alabama. tissues were digested in acid-pepsin solution and inoculated into groups of 3-5 laboratory mice. toxoplasma gondii was isolated from 27 of 101 (26.7%) raptors: 8 of 12 (66.7%) red-shouldered hawks (buteo lineatus), 13 of ... | 1993 | 8277379 |
| antibody prevalence and isolation of viable toxoplasma gondii from raptors in the southeastern usa. | raptors are good indicators of the prevalence of toxoplasma gondii in the environment because they prey on small mammals and birds. these prey species are a major source of infection in domestic cats ( felis catus ), which shed the environmentally resistant oocysts. we assessed t. gondii infection in 281 opportunistically available raptors at a rehabilitation facility between 2012 and 2014. antibodies to t. gondii were assayed by a modified agglutination test (cutoff 1:25) and found in serum of ... | 2016 | 27243150 |
| chlamydia buteonis, a new chlamydia species isolated from a red-shouldered hawk. | chlamydiaceae are obligate intracellular bacterial pathogens for humans and animals. a recent study highlighted that a chlamydiaceae intermediary between c. psittaci and c. abortus can infect hawks. here, an isolate was obtained upon passage of cloacal and conjunctival sac material collected from a female hatch-year red-shouldered hawk (buteo lineatus) in cultured cells. the diseased bird, one of 12 birds housed in a rehabilitation center, developed conjunctivitis and later died. swabs from both ... | 2019 | 31257045 |
| lead exposure of red-shouldered hawks during the breeding season in the central appalachians, usa. | lead is toxic to humans and wildlife. most studies of lead exposure of raptors focus on the winter, non-breeding season when they scavenge heavily. we evaluated blood lead concentrations (blcs) of red-shouldered hawks (buteo lineatus) during the non-scavenging season in the eastern united states. blcs of 53 of 70 hawks were above the limit of detection ([formula: see text] = 9.25 µg/dl ± 19.81; ± sd). adult hawks had higher blcs ([formula: see text] = 12.86 µg/dl ± 24.72) than did nestlings ([fo ... | 2019 | 31646347 |
| repair of wing fractures in a red-shouldered hawk. | | 1970 | 5201327 |
| feather mercury concentrations in north american raptors sampled at migration monitoring stations. | we assessed total mercury (thg) concentrations in breast feathers of diurnal north american raptors collected at migration monitoring stations. for 9 species in the pacific flyway, we found species and age influenced feather thg concentrations whereas sex did not. feather thg concentrations µg/g dry weight (dw) averaged (least squares mean ± standard error) higher for raptors that generally consume > 75% avian prey (sharp-shinned hawk accipiter striatus: n = 113; 4.35 ± 0.45 µg/g dw, peregrine f ... | 2019 | 30761431 |
| comparative phylogeography and population genetics within buteo lineatus reveals evidence of distinct evolutionary lineages. | traditional subspecies classifications may suggest phylogenetic relationships that are discordant with evolutionary history and mislead evolutionary inference. to more accurately describe evolutionary relationships and inform conservation efforts, we investigated the genetic relationships and demographic histories of buteo lineatus subspecies in eastern and western north america using 21 nuclear microsatellite loci and 375-base pairs of mitochondrial control region sequence. frequency based anal ... | 2008 | 18848634 |
| contrasting molecular and morphological evidence for the identification of an anomalous buteo: a cautionary tale for hybrid diagnosis. | an adult buteo was found dead as a road-kill south of sacramento, california, and was thought to represent the first state record of the eastern red-shouldered hawk (b. lineatus lineatus;). it is now a specimen in the museum of wildlife and fisheries biology (wfb 4816) at the university of california, davis. we examined this specimen and found that many of its plumage characters differed from all other adult red-shouldered hawks examined, including nominate adults. plumage markings and measureme ... | 2017 | 28097061 |
| residue of organochlorine compounds and mercury in birds' eggs from the niagara peninsula, ontario. | eggs (307) were collected in 1971 from twenty species of birds with a variety of feeding habits from the niagara peninsula. this area of ontario is intensively developed for agriculture and heavy industry and has a large urban population. representative species were obtained from both the terrestrial and aquatic food chains. eggs were analyzed for organochlorine insecticides, polychlorinated biphenyls, and total mercury. eggs from carnivorous species at the top of the aquatic food chain had the ... | 1975 | 1155964 |
| feeding ecology drives lead exposure of facultative and obligate avian scavengers in the eastern united states. | lead poisoning of scavenging birds is a global issue. however, the drivers of lead exposure of avian scavengers have been understood from the perspective of individual species, not cross-taxa assemblages. we analyzed blood (n = 285) and liver (n = 226) lead concentrations of 5 facultative (american crows [corvus brachyrhynchos], bald eagles [haliaeetus leucocephalus], golden eagles [aquila chrysaetos], red-shouldered hawks [buteo lineatus], and red-tailed hawks [buteo jamaicensis]) and 2 obligat ... | 2020 | 32022303 |
| prevalence of sarcocysts in the muscles of raptors from a rehabilitation center in north carolina. | the life cycle of sarcocystis species is heteroxenous (2-host), with carnivores being the definitive host and herbivores serving as intermediate hosts in predator-prey relationships. raptors (eagles, hawks, falcons, and owls) are apex predators and are not consumed routinely by other carnivores, making the occurrence of sarcocysts in their muscles unusual. recent reports of sarcocysts in eagles and owls with sarcocystis encephalitis suggests that this condition may be becoming more frequent, and ... | 2019 | 30807729 |
| bronchial carcinoma in a red-shouldered hawk (buteo lineatus). | respiratory neoplasms are rare in birds. this report describes carcinoma of the bronchial epithelium in a red-shouldered hawk (buteo lineatus) that presented with weakness and lethargy lasting 4 days that progressed to seizures. grossly, the caudal air sac and coelomic cavity contained approximately 15 ml of dark brown cloudy fluid that displaced the intestines cranially. nodular plaques were present on the viscera and air sacs. microscopic examination of tissues revealed a mass that expanded th ... | 2011 | 22946389 |
| genetic characterization of toxoplasma gondii in wildlife from alabama, usa. | the genetic diversity of toxoplasma gondii circulating in wildlife is of interest to understand the transmission of this parasite in the environment. in the present study, we genetically characterized five t. gondii isolates from different wild animals including two isolates from a bobcat (lynx rufus), one from a red-shouldered hawk (buteo lineatus), one from a white-tailed deer (odocoileus virginianus), and one from a bald eagle (haliaeetus leucocephalus). genotyping of these samples using 11 p ... | 2013 | 23160892 |
| parasite infections in nestling red-shouldered hawks (buteo lineatus) in northeast wisconsin. | red-shouldered hawks (buteo lineatus) are threatened in wisconsin and long-term data suggest that nest productivity is low in the state for unknown reasons. our objective was to determine whether red-shouldered hawks in northeast wisconsin were infected with parasites that could contribute to low nest productivity. we examined nestlings for the presence of trichomonas gallinae, protocalliphora avium, and blood parasites in june 2006 and 2007. we did not detect t. gallinae in throat swabs taken f ... | 2010 | 20557199 |
| pathology and epidemiology of natural west nile viral infection of raptors in georgia. | carcasses from 346 raptors found between august 2001 and december 2004 were tested for west nile virus (wnv) using virus isolation and immunohistochemistry; 40 were positive for wnv by one or both methods. of these 40 birds, 35 had histologic lesions compatible with wnv infection, one had lesions possibly attributable to wnv, and four had no histologic evidence of wnv. the most common histologic lesions associated with wnv infection were myocardial inflammation, necrosis, and fibrosis; skeletal ... | 2007 | 17495305 |
| mites of the subfamily harpirhynchinae (acariformes: harpirhynchidae) from north american birds. | three new harpirhynchid species of the subfamily harpirhynchinae (acariformes: harpirhynchidae) are described from north american birds: harpyrhynchoides aegolius sp. n. from aegolius acadicus (strigiformes: strigidae), harpyrhynchoides accipiter sp. n. from accipiter striatus (accipitriformes: accipitridae), and neharpyrhynchus icterus sp. n. from icterus galbula (passeriformes: icteridae). three species are recorded from new hosts from north america for the first time: harpyrhynchoides trachea ... | 2013 | 23802444 |
| evaluating habitat as a surrogate for population viability using a spatially explicit population model. | because data for conservation planning are always limited, surrogates are often substituted for intractable measurements such as species richness or population viability. we examined the ability of habitat quality to act as a surrogate for population performance for both red-shouldered hawks (buteo lineatus) and northern goshawks (accipiter gentilis). we compared simple measures of habitat quality to estimates of population growth rates obtained from a spatially explicit model of population dyna ... | 2004 | 15141448 |
| studies on helminths of north carolina vertebrates. iv. parastrigea tulipoides sp. n., a trematode (strigeida:strigeidae) from the red-shouldered hawk. | | 1965 | 14259475 |
| microplastic accumulation in the gastrointestinal tracts in birds of prey in central florida, usa. | a study was conducted to quantify the abundance of plastic pollution in the gastrointestinal tracts in birds of prey. data was collected from all birds retrieved from the audubon center for birds of prey in central florida, usa from january to may 2018. individuals were either dead prior to reaching the center or died within 24 h of arrival with no food consumed during captivity. sixty-three individuals representing eight species were dissected to extract the gastrointestinal (gi) tract from the ... | 2020 | 32388295 |
| investigating spatial patterns of mercury and rodenticide residues in raptors collected near the charlotte, nc, usa, metropolitan area. | raptor population growth is dynamic and trends vary across species and by location in the united states. for those species that are declining, it is important to identify potential causes including chemical contaminants. sampling wild raptors is problematic due to their small population sizes and role as a top predator. therefore, we obtained liver samples (n = 56) from carcasses of several raptor species, including common species like red-tailed hawks, red-shouldered hawks, barred owls, great h ... | 2018 | 30251047 |
| phylogeography and species limits in the red-shouldered hawk (buteo lineatus): characterization of the northern florida suture zone in birds. | the north american red-shouldered hawk, buteo lineatus, is comprised of two widely allopatric eastern and western populations with an additional well-marked subspecies in the florida peninsula. the two eastern populations meet in northern florida, the location of a well-known suture zone in many nonavian organisms. we sequenced the complete mitochondrial nd2 gene and two nuclear introns to investigate its genetic population structure and species status. no mitochondrial haplotypes were shared be ... | 2019 | 31236218 |