| salmonellosis in songbirds in the canadian atlantic provinces during winter-summer 1997-98. | from winter 1997 to summer 1998, an epizootic of salmonellosis affected several species of songbirds over a large area of the eastern north american continent. this article describes the details of this epizootic in the canadian atlantic provinces, based on laboratory examination of dead affected birds and on suspected but unconfirmed cases of salmonellosis reported by members of the public. the common redpoll (carduelis flammea) was the species most often affected, followed by pine siskins (c. ... | 2000 | 10642873 |
| mycoplasmal conjunctivitis in songbirds from new york. | a field study was conducted to determine the prevalence of conjunctivitis and mycoplasma gallisepticum (mg) infections in house finches (carpodacus mexicanus) and other songbirds common to bird feeders in tompkins county (new york, usa). eight hundred two individuals of 23 species and nine families of birds were captured and given physical examinations during the 14 mo study beginning in february 1998. clinical conjunctivitis (eyelid or conjunctival swelling, erythema, and discharge) was observe ... | 2000 | 10813607 |
| host range and dynamics of mycoplasmal conjunctivitis among birds in north america. | an epidemic of conjunctivitis among house finches (carpodacus mexicanus) caused by mycoplasma gallisepticum (mg) bacterial infections was first described in 1994. the disease exhibits high primary host specificity, but has been isolated from a limited number of secondary avian hosts at various times and locations. we used records from the house finch disease survey, a continent-wide, volunteer monitoring project, to document the host range of conjunctivitis in birds at feeding stations and to in ... | 2001 | 11272507 |
| new species of parasitic quill mites of the genus picobia (acari: syringophilidae: picobiinae) from north american birds. | five new species of the genus picobia are described and illustrated: (1) p. leucophaeus sp. nov. from the laughing gull leucophaeus atricilla l. (charadriiformes: laridae) from texas; (2) p. troglodytes sp. nov. from the house wren troglodytes aedon vieillot (passeriformes: troglodytidae) from california; (3) p. cardinalis sp. nov. from the northern cardinal cardinalis cardinalis (l.) (passeriformes: cardinalidae) from texas; (4) p. carpodacus sp. nov. from the purple finch carpodacus purpureus ... | 2010 | 20939365 |
| house finch (haemorhous mexicanus) conjunctivitis, and mycoplasma spp. isolated from north american wild birds, 1994-2015. | sampling wild birds for mycoplasma culture has been key to the study of house finch (haemorhous mexicanus) conjunctivitis, yielding isolates of mycoplasma gallisepticum spanning the temporal and geographic ranges of disease from emergence to endemicity. faced with the challenges and costs of sample collection over time and from remote locations for submission to our laboratory for mycoplasma culture, protocols evolved to achieve a practical optimum. herein we report making m. gallisepticum isola ... | 2016 | 27285414 |
| trichomoniasis in finches from the canadian maritime provinces--an emerging disease. | trichomoniasis was diagnosed in multiple incidents of mortality in wild purple finch (carpodacus purpureus) and american goldfinch (carduelis tristis) in the canadian maritimes. birds exhibited regurgitation, emaciation, and hyperplastic oropharyngitis, ingluvitis, and esophagitis. trichomonas gallinae was identified by histopathology and polymerase chain reaction (pcr). trichomoniasis (trichomonosis) is an emerging disease in wild finches of eastern canada. | 2010 | 20592828 |
| reconciling actual and inferred population histories in the house finch (carpodacus mexicanus) by aflp analysis. | the house finch (carpodacus mexicanus) is a native songbird of western north america that was introduced to the eastern united states and hawaiian islands in historic times. as such, it provides an unusually good opportunity to test the ability of molecular markers to recover recent details of a known population history. to investigate this prospect, genetic variation in 172 individuals from 16 populations in the western and eastern united states, southeastern canada, hawaiian islands, and mexic ... | 2003 | 14761063 |
| habits of the purple finch--corpodacus purpureus, gray. | | 1894 | 17843895 |
| speciational history of north american haemorhous finches (aves: fringillidae) inferred from multilocus data. | we investigated species relationships and timing of speciation in north american haemorhous finches by using a mitochondrial phylogeographic approach combined with a multilocus species tree reconstruction. haemorhous purpureus and h. cassinii were strongly supported as sister taxa, and h. mexicanus was sister to h. purpureus+h. cassinii. our divergence times indicated that diversification within haemorhous occurred progressively from the late miocene into the pleistocene. our inferred pattern of ... | 2013 | 23219607 |
| population genetic isolation and limited connectivity in the purple finch (haemorhous purpureus). | using a combination of mitochondrial and z-linked sequences, microsatellite data, and spatio-geographic modeling, we examined historical and contemporary factors influencing the population genetic structure of the purple finch (haemorhous purpureus). mitochondrial dna data show the presence of two distinct groups corresponding to the two subspecies, h. p. purpureus and h. p. californicus. the two subspecies likely survived in separate refugia during the last glacial maximum, one on the pacific c ... | 2016 | 27878097 |
| house finch ( haemorhous mexicanus)-associated mycoplasma gallisepticum identified in lesser goldfinch ( spinus psaltria) and western scrub jay ( aphelocoma californica) using strain-specific quantitative pcr. | : in 1994 mycoplasma gallisepticum was found to be the etiologic agent of house finch ( haemorhous mexicanus) conjunctivitis, a rapidly expanding epidemic caused by a genetically discrete, house finch-associated strain of m. gallisepticum (hfmg). while most prominent in house finches, hfmg has been reported in other members of the family fringillidae, including american goldfinches ( spinus tristis), purple finches ( haemorhous purpureus), pine grosbeaks ( pinicola enucleator), and evening gros ... | 2018 | 29053429 |
| brueelia (phthiraptera: ischnocera: philopteridae) of north american nine-primaried oscines (aves: passeriformes: passerida) with descriptions of nine new species. | nine new species of chewing lice in the genus brueelia kéler, 1936 , are described from north american hosts. they are brueelia thorini n. sp. from haemorhous mexicanus frontalis (say, 1822) and haemorhous mexicanus potosinus griscom, 1928; brueelia straseviciusi n. sp. from haemorhous purpureus (gmelin, 1789); brueelia mattsonae n. sp. from coccothraustes vespertinus brooksi (grinnell, 1917); brueelia novemstriata n. sp. from icterus wagleri wagleri sclater, 1857, and i. parisorum bonaparte, 18 ... | 2019 | 31730417 |
| examining the neural correlates of within-category discrimination in face and non-face expert recognition. | while expert face discrimination develops naturally in humans, expert discrimination in non-face object categories, such as birds, cars and dogs, is acquired through years of experience and explicit practice. the current study used an implicit visual discrimination paradigm and electroencephalography (eeg) - fast periodic visual stimulation - to examine whether within-category discrimination of faces and non-face objects of expertise rely on shared mechanisms despite their distinct learning hist ... | 2019 | 30659863 |
| interspecific competition between introduced house finch populations and two associated passerine species. | house finches (carpodacus mexicanus), natives of western north america, have expanded their range in the eastern united states since their 1940 release in new york city. range and the relation of house finch population growth to the population dynamics of house sparrows (passer domesticus) and purple finches (carpodacus purpureus) were examined, using data from the breeding bird survey and the christmas bird count. the house finch population grew exponentially throughout its eastern range. signi ... | 1987 | 28312977 |
| molecular characterization of trichomonas gallinae isolates recovered from the canadian maritime provinces' wild avifauna reveals the presence of the genotype responsible for the european finch trichomonosis epidemic and additional strains. | finch trichomonosis, caused by trichomonas gallinae, emerged in the canadian maritime provinces in 2007 and has since caused ongoing mortality in regional purple finch (carpodacus purpureus) and american goldfinch (carduelis tristis) populations. trichomonas gallinae was isolated from (1) finches and rock pigeons (columbia livia) submitted for post-mortem or live-captured at bird feeding sites experiencing trichomonosis mortality; (2) bird seed at these same sites; and (3) rock pigeons live-capt ... | 2015 | 25804862 |
| color and spatial frequency differentially impact early stages of perceptual expertise training. | the current study examined the role of color and spatial frequency on the early acquisition of perceptual expertise after one week of laboratory training with bird stimuli. participants learned to categorize finches (or warblers) at the subordinate species level (e.g., purple finch) and categorize warblers (or finches) at the more general family level. training images were presented in their natural colors across 6 sessions. participants completed a subordinate level species matching task prior ... | 2019 | 30471254 |