Searching documents for: ""

835 record(s) found.

COSEWIC Status Reports

  • Letter from COSEWIC to Minister McKenna regarding Emergency Assessments (2018)
    In British Columbia, Oncorhynchus mykiss occurs as two evolutionary lineages, commonly referred to as “coastal” and “interior” O. mykiss. Both lineages of O. mykiss are found in freshwater-resident and anadromous (sea run) populations or life-history types, known as Rainbow Trout and Steelhead Trout, respectively. Interior O. mykiss are found in the Thompson-Chilcotin rivers (part of the Fraser River drainage). There is some interbreeding between ...
  • Steelhead Trout (Oncorhynchus mykiss), Thompson River and Chilcotin River populations in Canada, 2018: COSEWIC Technical summaries and supporting information for emergency assessments (2018)
    In British Columbia, Oncorhynchus mykiss occurs as two evolutionary lineages, commonly referred to as “coastal” and “interior” O. mykiss. Both lineages of O. mykiss are found in freshwater-resident and anadromous (sea run) populations or life-history types, known as Rainbow Trout and Steelhead Trout, respectively. Interior O. mykiss are found in the Thompson-Chilcotin rivers (part of the Fraser River drainage). There is some interbreeding between ...
  • COSEWIC Assessment and status report on the Burrowing Owl Athene cunicularia in Canada (2018)
    Burrowing Owls (Athene cunicularia)are small, long-legged predators of the open prairie closely associated with burrowing mammals such as American Badger, Richardson’s Ground Squirrel, Black-tailed Prairie Dog, Coyote, and foxes. Adult Burrowing Owls are intricately coloured with a mix of brown, white, and beige spotting. Juveniles are more richly coloured in dark brown and cream. Adults and young are relatively conspicuous when they are active d ...
  • COSEWIC Assessment and status report on the Annual Saltmarsh Aster Symphyotrichum subulatum in Canada (2018)
    Annual Saltmarsh Aster (previously assessed by COSEWIC as Bathurst Aster) is a small annual herb of brackish marshes and shores. In Canada, it is typically under 30 cm, and often under 10 cm tall, though it can grow much larger in the U.S.A. Stems are typically extensively branched with 5-60 heads (clusters of tiny bluish-white ray florets and yellow disk florets) in a pyramidal inflorescence. The short ray florets distinguish this species from c ...
  • COSEWIC Assessment and status report on the Anticosti Aster Symphyotrichum anticostense in Canada (2018)
    Anticosti Aster is a 10 to 75 cm tall, herbaceous species that spreads by long rhizomes to form loose clonal colonies. The stiff, narrowly linear leaves are somewhat leathery in texture, often arched, and have smooth or minutely toothed margins. Flowers are in long-stalked flower heads composed of purple ray (petal-like) florets and yellow disk florets. Anticosti Aster is a Holocene (<11,700 year old) species that originated by hybridization of N ...
  • COSEWIC Assessment and status report on the Atlantic Walrus Odobenus rosmarus rosmarus in Canada (2018)
    Walrus are large gregarious pinnipeds with upper canine teeth that grow into long tusks and a moustache of quill-like vibrissae. Newborns are ~120 cm long and 55 kg; males can grow to ~315 cm (~1100 kg) and females to ~277 cm (~800 kg). The Atlantic Walrus, Odobenus rosmarus rosmarus (Linnaeus, 1758) is one of two extant subspecies, the other being the Pacific Walrus (O. r. divergens). Atlantic Walrus traditionally provided important staples in t ...
  • COSEWIC Assessment and Status Report on the Bullsnake (Pituophis catenifer sayi) in Canada (2018)
    Bullsnake is one of three subspecies of gophersnakes in Canada. It is one of the largest species of snake in Canada, occasionally exceeding 2 m in length, and it has inspired countless reptile enthusiasts. Adults are yellowish with black, brown, or reddish-brown blotches on their dorsal and lateral scales. Distinguishing features include a narrow scale at the tip of the snout that is raised above the nearby scales, a dark line that crosses the he ...
  • COSEWIC Assessment and status report on the Butternut (Juglans cinerea) in Canada (2018)
    Butternut (Juglans cinerea) is a medium to large, deciduous tree of the walnut family reaching a height of up to 30 m. Its leaves are densely hairy, alternate, and composed of 11-17 pinnately-arranged, stalkless leaflets. The twigs are stout and hairy with a central pith divided into chambers. The Butternut fruit is a sticky-hairy, egg-shaped husk enclosing a single two-chambered nut within a hard, jagged-ridged shell.
  • COSEWIC Assessment and status report on the Caribou (Rangifer tarandus) Eastern Migratory population, Torngat Mountains population in Canada (2018)
    Caribou (Rangifer tarandus) are a medium-sized member of the deer family. Their relatively long legs and large hooves facilitate living in deep snow associated with northern environments. Caribou are central to the culture, spirituality, and subsistence of many northern Aboriginal communities, and are also important to non-Aboriginal people across Canada. Caribou exhibit high variability in morphology, ecology, and behaviour across their circumpo ...
  • COSEWIC Assessment and status report on the Chinook Salmon (Oncorhynchus tshawytscha) Okanagan population in Canada (2018)
    Chinook Salmon (Salmonidae: Oncorhynchus tshawytscha Walbaum) is one of seven species of the genus Oncorhynchus native to North America. This report assesses the status of the Chinook Salmon population within the Okanagan Watershed in British Columbia. The Okanagan Chinook population is part of a larger population complex that includes other summer and fall migrating ocean-type populations that spawn in the tributaries of the upper Columbia River ...
  • COSEWIC Assessment and status report on the Columbia Dune Moth (Copablepharon absidum) in Canada (2018)
    The Columbia Dune Moth, Copablepharon absidum, is a medium-sized moth (forewing length 16-19 mm) in the family Noctuidae. The forewings are yellow or yellow-orange, often with olive-grey shading, and two slightly paler streaks along its wings.
  • COSEWIC Assessment and status report on the Deepwater Sculpin (Myoxocephalus thompsonii) in Canada (2018)
    Deepwater Sculpin (Myoxocephalus thompsonii) is a lake-dwelling sculpin that serves as an important prey item of coldwater piscivores of commercial, recreational, and Aboriginal (CRA) value, such as Lake Trout (Salvelinus namaycush) and Burbot (Lota lota). It is sometimes confused with the closely related Fourhorn Sculpin (Myoxocephalus quadricornis), which has both marine and freshwater forms. However, Deepwater Sculpin is morphologically distin ...
  • COSEWIC Assessment and Status Report on the Eastern Banded Tigersnail Anguispira kochi kochi and Western Banded Tigersnail Anguispira kochi occidentalis in Canada (2018)
    Banded Tigersnail is a large land snail (adult shell width 2.0 – 2.5 cm) with a globular, yellow to brown shell that has an opening in the centre when viewed from below and a light-coloured spiral band bordered by a darker band on either side. Variations include size, shell thickness, and colour of the shell, as well as the visibility of bands. Two subspecies are currently recognized: Anguispira kochi kochi on the Lake Erie islands in Ontario, an ...
  • COSEWIC Assessment and status report on the Eastern Pondmussel (Ligumia nasuta) in Canada (2018)
    Eastern Pondmussel, Ligumia nasuta, is a medium-sized freshwater mussel with an average length of 74 mm. It has a compressed, elongate shell with a distinctive, bluntly pointed posterior end. The outside of the shell varies in colour from yellowish- or greenish-black in juveniles to dark brown or black in adults. Narrow green rays, concentrated at the posterior end of the shell, are often visible in juveniles and light-coloured adults. The nacre ...
  • COSEWIC Assessment and status report on the Harris’s Sparrow (Zonotrichia querula) in Canada (2018)
    Harris’s Sparrow is a large sparrow with a distinctive black hood and bib. Both sexes have similar plumage. Non-breeding and first-year birds are similar to each other in plumage, lacking much of the black bib and facial patterning found in breeding individuals. Harris’s Sparrow is the only passerine that breeds exclusively in Canada.

[1 of 56] [Suivant/Next]