Henslow's Sparrow - South Dakota Birds and Birding Henslow's Sparrow Range Map. Globally, this species is classified as Near Threatened and ranked as apparently secure (G4). Rice. Breeding territories are small and often clustered in loose colonies. [Observed, estimated, inferred or suspected] percent [reduction or increase] in total number of mature individuals over any [10 years or 3 generations] period, over a time period including both the past and the future. Further to the Terms and conditions for this website, some of the photos, drawings, and graphical elements found in material produced by COSEWIC are subject to copyrights held by other organizations and by individuals. Based on BBS point count data from the 1990-99 period, the global population was estimated to be about 80,000 birds, of which less than 1% (ca. Data Deficient (DD)*** A category that applies when the available information is insufficient (a) to resolve a species’ eligibility for assessment or (b) to permit an assessment of the species’ risk of extinction. Are the causes of the decline clearly reversible and understood and ceased? U.S. Department of Agriculture, Forest Service, North Central Research Station, 46 pp. Surface-mine grasslands. 1994, 1997). Ontario Birds 12 (2): 59-66. Royal Ontario Museum, Toronto, ON. Recognition of intraspecific taxa in the Henslow’s Sparrow remains disputed, and the taxonomic validity and continued existence of an Atlantic slope race (ssp. The CBC provides information on the distribution and abundance of wintering bird populations in North America. 2010). Special Concern (SC)* A wildlife species that may become a threatened or an endangered species because of a combination of biological characteristics and identified threats. Species at Risk Act Public Registry. Parks Canada Agency. The BBS has been run annually in the US and Canada since 1966. Managed Area Element Status Assessment, Revised August 2008. Bannon, P. 1996, Henslow’s Sparrow. This species is currently classified as Near Threatened on the IUCN Red List due to suspected moderately rapid population declines over the last three decades (BirdLife International 2008). The Breeding Birds of Quebec: Atlas of the Breeding Birds of Southern Quebec. The CBC involves thousands of volunteers and is carried out annually over a three-week period between 14 December and 5 January. 1991. 2008. Recently, the Henslow’s Sparrow has been found wintering in saline prairie (salt barrens) in southern Arkansas at densities similar to those found in Longleaf Pine savannas (Cooper 2009). Cornell Lab of Ornithology: Ithaca, NY. It has been identified as a “focal species for conservation action” and a “Bird of Management Concern” by the U.S. The Henslow’s Sparrow in Ontario: A historical perspective. Partners in Flight Technical Series No 5. Ontario Nest Records Scheme – Thirty-Ninth Report, 2007. Cadman, P.F.J. History and restoration of the longleaf pine-grassland ecosystem: Implications for species at risk. No Henslow’s Sparrow were reported during the habitat assessments carried out in 2007 and 2008 (Environment Canada 2010). Bird Studies Canada, Environment Canada, Ontario Field Ornithologists, Ontario Ministry of Natural Resources, and Ontario Nature, Toronto. (Version 12DEC2003). This species also received legal protection in the United States and Mexico under similar legislation. 1- 10 pp. This species exhibits some adaptations to the natural variability and uncertainty in its breeding and wintering habitat supply including: an aptitude for finding and colonizing new sites (as demonstrated by intermittent site occupancy and supported by low breeding and winter site fidelity), higher breeding densities in years with increased moisture availability, a long breeding season, and a tendency to shift sites within a breeding season (Herkert et al. Does not meet criterion. 2007). 2004). Status re-examined and designated Endangered in April 1993. This species has also been observed in winter in other habitats such as grassy swales, marsh borders, utility line rights-of-way, roadsides, unmowed fields, and saline prairie. Catalogue of Canadian birds. Trends in breeding habitat availability in the United States show more temporal and geographic variability than the simple pattern of expansion and contraction in the availability of agricultural grasslands seen in Canada (Pruitt 1996; Burhans 2002; Cooper 2007, 2009). 2005). U.S. Department of Interior, Washington, D.C. 36 pp. The Canadian breeding distribution is restricted to the Mixedwood Plain ecozone in southern Ontario and southwestern Quebec. BirdLife International. Given an average territory size of about 1 ha, the biological area of occupancy over the past decade is less than 1 km². The U.S. Relationships among the Emberizid Sparrows. Understood but continued habitat loss and degradation. The population estimate is consistent with other recent estimates of the Ontario population (Table 2). In addition, some extensive native and anthropogenic grasslands on public lands in the eastern US, including military installations and national forests are being actively managed to conserve grassland birds (Burhans 2002; Cooper 2007). To correct for variations in effort, CBC data are generally reported as individuals per party-hour. Francis, P.J. This species is rarely observed during fall migration but available data indicate that Ontario birds likely begin their fall migration anytime from late July to late October (Speirs 1985; Huebert and Wormington 2008). These habitat elements may be particularly important at low population densities (Cooper 2009). Is there an [observed, inferred, or projected] continuing decline in number of populations? Committee on the Status of Endangered Wildlife in Canada, Ottawa, ON. In addition, areas in Ontario on which Henslow’s Sparrow depend directly or indirectly to carry on its life processes are protected under the general habitat protection provision of the ESA 2007, as a species-specific habitat regulation has not yet been developed for this species (OMNR 2008). 2009. 1 Up to 4 birds. Fieldwork for the first and second Ontario BBAs was carried out between 1981-85 (OBBA1) and 2001-05 (OBBA2), respectively (Cadman et al. Activities that result in the destruction of this habitat include natural succession to shrubland or forest in the absence of disturbance, aforestation, drainage or infilling of low-lying areas, residential development, and urbanization.
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