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Wolfe Island (ON037)

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Wolfe Island (ON037)

Kingston, Ontario

Latitude 44,178°N
Longitude 76,383°O
Altitude 75 - 80m
Superficie 271,97km²

Description du site

Wolfe Island lies at the extreme northeast corner of Lake Ontario, where the waters of the lake flow into the St. Lawrence River. It is about 3 km south of Kingston, Ontario, and about 3 km north of Cape Vincent in New York state. Wolfe Island is divided into two by Bayfield Bay, with the largest landmass to the west and a long narrow extension on the eastern side. It is the western section that is most productive for land birds. In this habitat, vole (Microtus) populations occur at higher densities than in areas within the nearby mainland. The island is fairly flat, and it consists mainly of farmland interspersed with woodlots and areas of marsh. A network of gravel roads criss-crosses the island. The shoreline is deeply indented, with numerous secluded bays that contain sand and gravel beaches as well as offshore bars. The largest town, Marysville, lies along the northwest coast of the island.

Oiseaux

Large numbers of several waterfowl species congregate around Wolfe Island during the spring migration. One-day peak counts of as many as 15,000 Greater Scaup (March 1996) and 7,500 Canvasbacks (April 1995) have been recorded (about 2% and 1% of their respective North American populations). Large numbers of Canada Geese have also been recorded during spring migration, with over 10,000 being observed in March of 1997. Although it is likely that this estimate contained individuals from both the migratory Atlantic and resident Great Lakes population, the figure still represents greater than 1% of their combined biogeographic populations. Other notable one-day counts include: 5,000 Ring-necked Ducks, 4,000 Common Goldeneye, 3,700 Redheads, 1,222 American Black Ducks, 350 Snow Geese, 50 Tundra Swans, and 46 American Golden Plovers.

Large numbers of landbirds, such as the 10,000 Tree Swallows counted in October 1994, have also been observed at this site. Wolfe Island, together with Amherst Island, is internationally known as a site for large winter concentrations of hawks and owls. Some of the largest winter totals in Ontario for Snowy Owl and Rough-legged Hawks have occurred here. Some peak winters for Snowy Owls have been: 1972 (87 Snowy Owls), 1974 (69), 1965 (55), and 1980 (32). During December Christmas Bird Counts of the 1990s, 76 Red-tailed Hawks (1993), 22 Rough-legged Hawks (1995) and 18 Short-eared Owls (1995) have been recorded. Other high counts include 106 Rough-legged Hawks (1985), and 47 (1977) Short-eared Owls. The latter species, which is nationally vulnerable, sometimes breeds on the island after winter invasions.

Least Bittern (nationally vulnerable), Black-crowned Night-Heron and Black Tern have all bred in the Big Sandy Bay Wetland. Also, historically, the nationally endangered Henslows Sparrow was recorded on the island (1950).

Enjeux de conservation

As with many islands located in close proximity to heavily populated cities, housing and recreational developments may threaten some of the remaining natural habitat on Wolfe Island. With increased recreational use also comes the potential for increased levels of disturbance.

Catégories ZICO Habitats Usages Menaces Potencielles ou Existantes Status de Protection
Fuligule milouinan
Nombre Année Saison
4 2482017Printemps
4 7292015Automne
6 9762011Hiver
5 000 - 10 0002010Automne
4 800 - 20 0002009Automne
4 2272002Hiver
6 9341998Hiver
15 0001996Printemps
8 0001990Automne
Harle huppé
Nombre Année Saison
8 4492014Hiver
6 9502012Hiver
3 5422011Hiver
Fuligule à tête rouge
Nombre Année Saison
4 7562017Printemps
7 0002017Hiver
4 5002016Automne
8 000 - 14 4702015Automne
9 0002011Automne
5 986 - 7 0002010Hiver
8 0002010Automne
12 000 - 16 0002009Automne
5 0442006Hiver
3 7001993Automne
Fuligule à dos blanc
Nombre Année Saison
7 5001995Printemps
Canard noir
Nombre Année Saison
6 1602002Hiver
1 2221992Hiver
Quiscale rouilleux
Nombre Année Saison
25 - 852017Printemps
1502016Printemps
602015Automne
30 - 802014Automne
252014Printemps
602013Automne
1302011Automne
502010Automne
Mouette pygmée
Nombre Année Saison
22017Printemps
32013Printemps
Martinet ramoneur
Nombre Année Saison
302011Printemps
Colin de Virginie
Nombre Année Saison
21999Hiver
31997Hiver
61996Hiver
51995Hiver
131993Hiver
31992Hiver
21991Hiver
51990Hiver