| survey of q-fever agglutinins in birds and small rodents in northern california, 1975-76. | serum samples from 15 species of rodents and 33 species of birds were tested for agglutinins against coxiella burnetii by the microagglutination test. of 759 rodents tested, 21 (3%) were seropositive. antibody positive rodents included muskrats, ondatra zebethica, (11%), rattus spp. (10%), beechey ground squirrels, otospermophilus beecheyi, (6%), wood rats, neotoma fuscipes, (5%), and peromyscus spp. (2%). of 583 birds tested, 118 (20%) were seropositive. this included white crowned sparrows, zo ... | 1979 | 522220 |
| comparison of immune responses of brown-headed cowbird and related blackbirds to west nile and other mosquito-borne encephalitis viruses. | the rapid geographic spread of west nile virus (family flaviviridae, genus flavivirus, wnv) across the united states has stimulated interest in comparative host infection studies to delineate competent avian hosts critical for viral amplification. we compared the host competence of four taxonomically related blackbird species (icteridae) after experimental infection with wnv and with two endemic, mosquito-borne encephalitis viruses, western equine encephalomyelitis virus (family togaviridae, gen ... | 2007 | 17699082 |
| detection of lawsonia intracellularis by real-time pcr in the feces of free-living animals from equine farms with documented occurrence of equine proliferative enteropathy. | the objective of this study was to determine whether lawsonia intracellularis was present in the feces of free-living animals collected on two equine premises with documented occurrence of equine proliferative enteropathy (epe). fresh feces from black-tailed jackrabbits (lepus californicus, n=100), striped skunks (mephitis mephitis, n=22), feral cats (felis catus, n=14), brewer's blackbirds (euphagus cyanocephalus, n=10), virginian opossums (didelphis virginiana, n=9), raccoons (procyon lotor, n ... | 2008 | 18957657 |
| quill mites of the genus syringophilopsis kethley, 1970 (acari: syringophilidae) from north american birds. | seven mite species belonging to the genus syringophilopsis kethley, 1970 (acari: prostigmata: cheyletoidea) are recorded from 10 passeriform host species from the usa. three new species are described and illustrated: syringophilopsis polioptilus sp. n. from polioptila caerulea (linnaeus) (polioptilidae); s. empidonax sp. n. from empidonax hamrnmondii (vesey) and empidonax wrightii baird (tyrannidae); and s. sialiae sp. n. from sialia mexicana swainson (turdidae). in addition, records of new host ... | 2008 | 19175207 |
| four new species of aulonastus kethley, 1970 (acari: syringophilidae) from north american passerines. | four new species belonging to aulonastus kethley, 1970 (acari: prostigmata: syringophilidae), which are found inside the quills of body feathers of north american passerines (aves: passeriformes), are described and figured: a. emberizicus n. sp. from ammodramus savanarum (gmelin) (emberizidae) (type-host) in texas, zonotrichia atricapilla (gmelin) (emberizidae) in california and passerculus sandwichensis (gmelin) (emberizidae) in texas; a. euphagus n. sp. from euphagus cyanocephalus (wagler) (ic ... | 2010 | 20437219 |
| blood-feeding patterns of the culex pipiens complex in sacramento and yolo counties, california. | mosquitoes in the culex pipiens complex are competent vectors of west nile virus (wnv; family flaviviridae, genus flavivirus) in the laboratory, and field-collected mosquitoes have tested positive for the virus in california and elsewhere. a better understanding of cx. pipiens complex blood-feeding patterns will help define the threat that these mosquitoes pose to human health and their role in wnv amplification in northern california. we collected blood-engorged cx. pipiens complex mosquitoes f ... | 2011 | 21485380 |
| characterization of the reflective materials and organelles in the bright irides of north american blackbirds (icterinae). | the reflective materials in the iris stroma of bright-irised american blackbirds (icterinae, emberizidae) and the red-eyed vireo (vireo olivaceus) (vireonidae) were characterized using high-performance liquid chromatography (hplc) and diode-array detection. two purines, guanine and hypoxanthine, and two pteridines, leucopterin and xanthopterin, were detected in large amounts in all bright irides. the brown iris of the red-winged blackbird (agelaius phoeniceus) by comparison contained only small ... | 1996 | 8857673 |
| the patch distributed producer-scrounger game. | grouping in animals is ubiquitous and thought to provide group members antipredatory advantages and foraging efficiency. however, parasitic foraging strategy often emerges in a group. the optimal parasitic policy has given rise to the producer-scrounger (ps) game model, in which producers search for food patches, and scroungers parasitize the discovered patches. the n-persons ps game model constructed by vickery et al. (1991. producers, scroungers, and group foraging. american naturalist 137, 84 ... | 2009 | 19501599 |
| breeding success and nest site stereotypy in a population of brewer's blackbirds (euphagus cyanocephalus). | nest site stereotypy and nest-site related breeding success was studied in a population of brewer's blackbirds in eastern washington, usa. four types of nest sites could be distinguished. based on individually colour-ringed nestlings, imprinting or genetic fixation of a particular type of nest site can be ruled out since there is no correspondence between the type of nest a bird grew up in and the type it used when breeding. bush nests make up about two thirds of all nests, and they are relative ... | 1975 | 28308707 |
| electrophoretic studies on hemoglobins of brewer's blackbird euphagus cyanocephalus. | | 1970 | 5441853 |
| range expansion of brewer's blackbird: phenetics of a new population. | | 1971 | 5101969 |