evening grosbeak range

evening grosbeak range

Entwistle, J.S. 2000). Holmes, S.B., C.J. Wilson Bulletin 101:606-620. In Quebec, where the largest total area of defoliated forest was found (> 40 million ha), a first peak was reached in 1975 with over 28 million ha defoliated and a second peak in 1983 with 12.5 million ha defoliated. Hoar, T. 2007. Is rescue from outside populations likely? Population trends across North America indicate widespread declines in the population from 1966 to 2015 but also patches of increases in the population (Figure8). However, given the irruptive nature of Evening Grosbeak movements, there can be high interannual variation in results, and therefore long-term trends are more meaningful than those for shorter periods. 2001). Reproduction and nest behaviour of Tennessee warblers, Vermivora peregrina, in forests treated with Lepidoptera-specific insecticides. The species was not abundant enough and was too variable to estimate its population size in Minnesota from the MNBBA. Project FeederWatch [accessed October 2015]. Booth. Marie, Michigan, in April 1823. 2007; Bergeron et al. 2008). Daoust, P.-Y. Bird Studies Canada. Visual counts of migratory birds in the Côte-Nord region of northern Quebec indicate that the number of Evening Grosbeaks migrating in fall has increased since 2012 (Explos-Nature 2014), corresponding to an increase in defoliation from 1.7 million ha in 2012 to 3.8 million ha in 2015 (MFFPQ 2014, 2015). The common name of Coccothraustes vespertinus (Cooper 1825) is Evening Grosbeak. A substantial long-term decline of Evening Grosbeaks in Canada is evident from both the CBC (cumulative population loss of 77%) and BBS (cumulative population loss of 86%) databases, and is reflected also in declines recorded by Project FeederWatch, the ÉPOQ database in Quebec, and comparisons between first and second generation breeding bird atlases in Ontario and the Maritimes. Federation of Alberta Naturalists. The Condor 81:211-212. 2000). Often Evening Grosbeaks have come to the southern edge of the boreal forest in the late fall, sometimes extending from Northern Minnesota to the Rockies. Couturier (eds.). Journal of Forestry 82:135-140. Bird communities in commercially thinned and unthinned Douglas-fir stands in western Oregon. The Boreal Avian Modeling Project. Cadman, Michael D., Paul F. J. Eagles, and Frederick M. Helleiner, eds. 1973; Daoust et al. Experimental Infection of North American Birds with the New York 1999 Strain of West Nile Virus. Acta Phytopathologica et Entomologica Hungarica32:205-215. 1974. The PFW database is also used for associating bird occurrence and abundance observations with gridded climate data because of its continuous winter sampling protocol, annual time series (1989-present), and large sample size (>10,000 participants per year; Strong et al. Do feeder counts reliably indicate bird population changes? Between 1989 and 1994, the mean count at feeders was highest in Quebec, Maritimes, Saskatchewan, Manitoba, Northwest Territories, British Columbia, and Alberta (mean count >16 birds). Publ., Toronto. Bird-Banding 25:87-94. During the breeding period, agonistic interactions have been reported with several species of forest birds, including Hairy Woodpecker (Picoides villosus), Eastern Phoebe (Sayornis phoebe), American Robin and Brown-headed Cowbird (Molothrus ater; Downs 1956). It does have a small repertoire of simple calls, including sweet, piercing notes and burry chirps. In terms of discreteness, plumage differences between C.v. vespertinus and C.v. brooksi are weak and clinal (Gillihan and Byers 2001): C.v. vespertinus can be distinguished from C.v. brooksi by its broader yellow supercilium and slightly shorter bill (Gillihan and Byers 2001), and females and juvenilesare darker brown (Godfrey 1985). His breeding range map included its summer distribution reaching to eastern Becker County. 2012. And if not, how did the bird get its name? 2000b. “Evening Grosbeak (Coccothraustes vespertinus).” Minnesota Biological Survey: Breeding Bird Locations. In Colorado, 35 of 64 nests (54.7%) followed during breeding were successful (fledged at least one young) (Bekoff et al. The Christmas Bird Count (CBC), which began in the early 1900s, estimates Evening Grosbeak population trends in North America in winter (Cornell University 2014) and is considered one of the most important sampling efforts to assess Evening Grosbeak trends across the species’ range. A minority of the population is expected to be exposed to this risk, and of those, probably only a small fraction would suffer mortality, especially as some of the roads are likely to be lightly traveled. According to the Partners in Flight Population Estimates database (Partners in Flight Science Committee 2013), which is based on a combination of BBS count data from 1998-2007 and Ontario Breeding Bird Atlas point counts from 2001-2005 (Blancher et al. Songbird community composition versus forest rotation age in Saskatchewan boreal mixedwood forest. 2015. 2015. ), Loi sur la conservation et la mise en valeur de la faune, Species at Risk Act: COSEWIC assessments and status reports, Wildlife species description and significance, Population spatial structure and variability, Residential and commercial development (housing and urban areas – low threat), Transportation and service corridors (roads and railroads – low threat), Biological resource use (logging and wood harvesting – low threat), Natural system modification (unknown threat), Pollution (industrial and military effluents – unknown threat), Agriculture and aquaculture (annual and perennial non-timber/livestock farming and ranching – negligible threat), Climate change and severe weather (negligible threat), Acknowlegements and authorities contacted, Appendix 1. Its decline is a combination of many factors, but at this time its future remains a mystery. Synchronous eruptions of boreal seed-eating birds, Scaly-leg (knemidokoptiasis) in a population of Evening Grosbeaks, Code of Practice for the Environmental Management of Road Salts, Evening Grosbeak (Coccothraustes vespertinus), Map 1: Terrestrial ecozones and marine ecoregions of Canada, Bird communities in commercially thinned and unthinned Douglas-fir stands in western Oregon, Longevity records of North American birds: Coerebinae through Estrildidae, Salmonellosis in passerine birds in Maryland and West Virginia (PDF Version; 198 KB), The Atlas of the Breeding Birds of British Columbia, 2008-2012, Consumption of Spruce Budworms by birds in a Maine spruce-fir forest. In Canada, Evening Grosbeak and its nests and eggs are protected under the Migratory Birds Convention Act, 1994. 1994. Number of locations for Evening Grosbeak is currently unknown but considering its wide distribution in Canada, it is probably high, and almost certainly >10. These latter results have to be viewed with caution as they do not take into account changes in the distribution of forests associated with climate change. Ecological Applications 13:1222-1232. Peakall, and A.J. 386-391 in D.M. Adult males have a dark brown head with a brilliant yellow supercilium; the brown of the head transitions to yellow upperparts and belly, contrasting with a black tail and black wings, with a distinct patch of all-white secondaries. Criterion D (Very Small or Restricted Population). Your Online Guide To Birds And Bird Watching. Titterington, and D.T. 2007, Photo: © reproduced with the permission of ABBQ 2014, Photo: © reproduced with the permission of BSC, 2015, Étude des populations d’oiseaux du Québec, ÉPOQ, Observatoire d’oiseaux de Tadoussac (OOT), Observatoire d’oiseaux de Tadoussac (OOT) QC, (Note: Formerly described as “Vulnerable” from 1990 to 1999, or “Rare” prior to 1990. Email correspondence to C. Savignac. 2015. The Birds of British Columbia. Differential migration in the Evening Grosbeak (Coccothraustes vespertinus): a test of hypotheses. The birds of the Monteregian Hills and the Montreal region of Québec, Canada. Lumley, L.M. Females are overall gray with some white on the wing. 2005; Krawchuk and Cumming 2011) and the average rate of precipitation (by 5%; Plummer et al. Synchronous eruptions of boreal seed-eating birds. Partners in Flight Science Committee. 53 pp. Dunn, E.H. 1993. This parameter was high in 1989 and 1990, corresponding to the peak in defoliated areas, then decreased in 1991 and remained fairly stable until 2009. 2016).

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