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Topic: Canvasback

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	Canvasback (Site not responding. Last check: 2007-11-03)
		The Canvasback (Aythya valisineria) is a large 15-inch duck with a 34-inch wingspan.
		The female Canvasback builds the nest, a bulky basketlike affair, in a marsh among dense vegetation.
		Canvasbacks migrate in the fall and early spring.
	www.jeannieshouse.com /aviary/canvasback_duck/canvasback.html (201 words)

	Hinterland Who's Who - Canvasback
		Although Canvasbacks dabble at times, they are diving ducks because they usually dive for their food and because, like other divers, they have a special lobe on their hind toe that they use like a paddle in the water.
		Canvasbacks take their scientific name Aythya valisineria from an aquatic plant, called wild celery Vallisneria americana, which is one of the foods that give this game bird an excellent flavour.
		Hochbaum, A. The Canvasback on a prairie marsh.
	www.hww.ca /hww2.asp?id=36 (1801 words)

	2002 Migratory Bird Print (Site not responding. Last check: 2007-11-03)
		Canvasbacks are the largest of a group of waterfowl known as pochards, or diving ducks.
		Canvasbacks are monogamous, and breed on open, freshwater marshes, as well as on ponds and lakes bordered by emergent vegetation.
		Canvasbacks are able to select food items based on taste, a trait that probably evolved in omnivores to distinguish between similar-sized food items that differ in their nutritional quality (e.g., insects vs. seeds).
	www.dec.state.ny.us /website/dfwmr/wildlife/migrbird/2002.html (1288 words)

	HOAGBA: Canvasback
		I let the Canvasback hens hatch their young most of the time, but I take the babies as soon as possible after hatching.
		All of the pens where the young ducks are kept have 9 foot shade cloth over one end with 1/2" X 1" vinyl-coated wire on the first three feet of the sides of the pen and then 1" X 1" vinyl-coated wire on the next three feet of the pen.
		Canvasbacks will raise their own if you let them and will do a good job at it.
	www.gbwf.org /hoagba/canvasback.html (739 words)

	Canvasback Ducks (Site not responding. Last check: 2007-11-03)
		Canvasbacks take their specific name from an aquatic plant, called wild celery, or Vallisneria americana, which is one of the foods that impart an excellent flavour to this game bird.
		Canvasbacks commonly build their nests near open water in the shallows of large sloughs, among cattails, bulrushes, and reeds.
		Canvasbacks that nest in the central and eastern prairies migrate southeastwards to wintering areas along the Atlantic coast, primarily in Virginia and Maryland.
	huntingsociety.org /canvasbackInfo.html (1744 words)

	Canvasback Ducks
		Canvasbacks nest in prairie, parkland, subarctic, and Great Basin wetlands; stage during spring and fall on prairie marshes, northern lakes, and rivers; and winter in Atlantic, Pacific, and Gulf of Mexico bays, estuaries, and some inland lakes.
		Canvasback numbers declined in response to loss of aquatic plants in the Chesapeake Bay, but increased in North Carolina and Virginia where preferred plant foods were still abundant (Lovvorn 1989).
		Information needs for improved management of canvasbacks include banding or radio-telemetry data sufficient to provide habitat information and estimates of region-specific rates of survival, band recovery, and recruitment; survival rates of immature birds between hatch and arrival on wintering areas; and cross-seasonal effects of winter nutrition and contaminant exposure on reproduction.
	biology.usgs.gov /s+t/noframe/b009.htm (2171 words)

	SDNHM Focus on Redheads and Canvasbacks
		The Canvasback's bill is uniformly dark; on the Redhead's bill, the fl tip contrasts with the gray base and is often separated by a whitish zone.
		The Canvasback, which occurs in southern California as a winter visitor only, is almost entirely a bird of fresh or brackish water.
		Canvasbacks may use the large reservoirs irregularly, though they are frequent on many of these, such as Wohlford (H12) and Barrett (S19).
	www.sdnhm.org /research/birdatlas/focus/redhead.html (1337 words)

	NatureWorks - Canvasback (Site not responding. Last check: 2007-11-03)
		The canvasback breeds in freshwater prairie marshes and swamps from Alaska south and east to Nebraska and Minnesota.
		The canvasback is a diving duck and it eats green aquatic vegetation.
		During the non-breeding season the canvasback gathers in large flocks or rafts on the water.
	www.nhptv.org /natureworks/canvasback.htm (304 words)

	Canvasback: Nature Snapshots from Minnesota DNR: Minnesota DNR
		While canvasback hunting seasons have been closed and bag limits reduced in the past, the canvasback population is now at high levels in many states.
		Canvasbacks are early nesters, usually the first week of May. On average, eight eggs per nest hatch, and the majority of ducklings survive.
		Canvasback nests are built from cattails or bulrushes and float on the water.
	www.dnr.state.mn.us /snapshots/birds/canvasback.html (286 words)

	Canvasback Page 3
		During incubation, redhead ducks (Aythya americanus) lay their eggs in canvasback nests to be incubated and raised by the canvasbacks.
		This type of behavior is called parasitism and studies in the Minnedosa area of Canada, a major breeding area in the north, have shown that it occurs in as many as 85% of the canvasback nests.
		Our study this summer at Ruby Lake found that 90% of the canvasback nests have been parasitized by redheads and the largest number of redheads eggs found in one canvasback nest was eleven.
	www.fws.gov /desfbay/Archives/Canvas/canvasback3.htm (314 words)

	Canvasback
		During breeding season, Canvasbacks choose small lakes, deep-water marshes, sheltered bays of large fresh water and alkali lakes, permanent and semi-permanent ponds, sloughs, potholes and shallow river impoundments.
		In winter, Canvasbacks can be found in a range of habitats such as deep freshwater lakes, coastal brackish and salt-water estuaries, shallow bays and harbors, riverine deltas and deltaic splays.
		Hochbaum, H.A. The Canvasback on a Prairie Marsh.
	www.deltawaterfowl.org /research/bios/canvasback.php (759 words)

	Canvasback Page 2
		Canvasbacks are diving ducks, which mean that they forage for their food underwater in bottom sediments.
		In the past, canvasbacks fed primarily on the starchy tubers of aquatic plants such as wild celery, eelgrass and sago found in estuaries, but with declining water quality, these plants were lost and clams are now their main food during the winter.
		We are concerned with the status and health of canvasback populations so we initiated a research study in March of 1998 to examine the effects these changes have on diving ducks in the estuary.
	www.fws.gov /desfbay/archives/Canvas/canvasback2.htm (344 words)

	Canvasback - Discover The Outdoors (Site not responding. Last check: 2007-11-03)
		Canvasbacks will breed in their first year if there is enough water and cover in the breeding grounds.
		The canvasback is a diving duck, using its long sloping bill to dig in a lake or river bottom for food.
		Canvasbacks are one of the most highly prized waterfowl and one of the most delicious.
	www.dto.com /hunting/species/generalprofile.jsp?speciesid=53&state=tx (751 words)

	The Canvasback-U.S. Fish and Wildlife Service (Site not responding. Last check: 2007-11-03)
		Canvasbacks are the largest of a group of widely distributed waterfowl known as pochards, or diving ducks.
		The name "canvasback" may have originated from the early method of shipping the ducks to market in canvas bags labeled "canvasback" to indicate return of the bags for reuse, although another explanation comes from the finely barred white plumage on the body of the duck which resembles the texture of canvas fabric.
		Other problems canvasbacks may encounter on the Bay include toxins entering their food supply, disturbance from shoreline development and recreational activities, oil spills, disease, and illegal hunting of females due to hunters misidentifying canvasbacks as female mallards.
	www.fws.gov /r5soc/r5cbfo/canvas.htm (947 words)

	Canvasback Ships
		Canvasback has provided free medical, dental and eye care to remote islands accessible only by sea.
		Canvasback Missions worked diligently for five years in the Republic of the Marshall Islands to make their outer island dispensary system self-sufficient.
		The Papaw is a 180-ft. seagoing buoy tender, a former U.S. Coast Guard WLB Class ship built in 1943 by the Marine Iron and Shipbuilding Co. of Duluth, Minn. Her home ports have included San Francisco, CA, Astoria, OR, Miami, FL, Charleston, SC, and Galveston, TX.
	www.canvasback.org /mission/ships.html (419 words)

	canvasback - HighBeam Encyclopedia (Site not responding. Last check: 2007-11-03)
		Canvasback conundrum; Canvasback numbers are on the decline again and Minnesota waterfowlers will be allowed to hunt the ducks for only a limited time this year.(SPORTS)(Ron Schara)
		Intensity and chronology of postreproductive molts in male Canvasbacks.
		This canvasback decoy urn was made by Steve Ree for his brother Mark, who's dog's remains had been sitting in a cardboard box for nearly nine years.The small engraved plaque on the base says: "Nellie
	www.encyclopedia.com /doc/1E1-x-canvasba.html (237 words)

	Canvasback--BIOLOGICAL AND ECOTOXICOLOGICAL CHARACTERISTICS OF TERRESTRIAL VERTEBRATE SPECIES RESIDING IN ESTUARIES
		Canvasbacks breed on prairie marshes with a mix of open water and fringe vegetation (Madge and Burn 1988).
		During the 1938-1954 hunting seasons, Canvasbacks were collected from 7 states of the Mississippi flyway (N=413) with 6.8% having ingested shot (includes both Pb and steel), and during the 1977-1979 hunting seasons, Canvasbacks were collected from 11 states of the Mississippi flyway (N=45) with 6.7% having ingested shot (includes both Pb and steel).
		Canvasbacks were collected from the Mississippi flyway during the 1996-1997 hunting season, and their gizzards were analyzed for shotgun pellets (toxic and nontoxic) (Anderson et al.
	www.pwrc.usgs.gov /bioeco/canvasback.htm (2989 words)

	Canvasback Population \| Indicators \| MED Large Lakes Research Branch \| US EPA (Site not responding. Last check: 2007-11-03)
		Canvasbacks are of special interest across the continent because they are less common than most other ducks, making them a prize hit for duck hunters.
		The number of canvasbacks counted during the Michigan survey ranged from 125 in 1974 to a record high 79,300 in 1999 (Figure 2).
		The November canvasback survey should be continued to monitor populations of canvasbacks migrating through the Detroit River corridor and Mississippi Flyway.
	www.epa.gov /med/grosseile_site/indicators/canvasback.html (1301 words)

	ESPN Outdoors - Profile: Canvasback (Site not responding. Last check: 2007-11-03)
		During the breeding season, the Canvasback prefers prairie lakes or pot holes, open marshes, estuarine bays and lagoons.
		The Canvasback eats plants and about 20 percent of their diet includes many forms of animal life.
		The Canvasback leaves its breeding area and moves southward along the Pacific Coast from British Columbia to Baja California; along the Atlantic Coast from Cape Cod to central Mexico.
	sports.espn.go.com /outdoors/hunting/news/story?page=g_enc_canvasback (249 words)

	Canvasback - Wikipedia, the free encyclopedia
		The Canvasback (Aythya valisineria) is a large diving duck, 48-60 cm long and weighing 1270 g.
		Canvasbacks are strongly migratory and overwinter on the coasts of the United States, the Great Lakes and British Columbia in saltwater bays, estuaries or lakes.
		Canvasbacks feed mainly by diving, sometimes dabbling, mostly eating aquatic plants with some molluscs, aquatic insects and small fish.
	en.wikipedia.org /wiki/Canvasback (216 words)

	WDNR - Habitat Restoration and Canvasback Status
		To determine the status of canvasback populations and diving duck migrational habitats in Wisconsin and to evaluate rehabilitation and restoration techniques for aquatic ecosystems used as migrational habitats by diving ducks.
		Canvasbacks may consume macrobenthic food items (e.g., small clams) in a few locations where wildcelery and fennel-leaf pondweed are unavailable.
		Although canvasbacks are the target species for habitat development, other diving ducks--particularly the redhead--and other non-bird species (including humans) would benefit from the improved or restored aquatic ecosystem.
	www.dnr.state.wi.us /org/es/science/restoration/canvasback.htm (241 words)

	Canvasback of Idaho - SUV Cargo Liners
		It installs in seconds, covering the floor of your vehicle's cargo area and the rear seat backrest.
		Canvasback is small enough to store under a seat, or leave it in place; it won't shrink or stretch from temperature extremes, and it won't rip, rot or mildew.
		Canvasback does not put holes in the liner to accommodate the 3rd seats.
	www.canvasback.com (188 words)

	NYSite West Side - Canvasback Duck
		Because canvasbacks strain many seeds with their bill out of bottom mud, they ingest much lead shot and are especially affected by lead poisoning.
		The canvasback is an extremely wary duck, which gathers together in rafts of sometimes hundreds of individuals.
		RANGE: Canvasback nests are found in freshwater marshes and pothole country from Alaska to Manitoba, south to Minnesota, Nebraska and California.
	www.nysite.com /nature/fauna/canvas.htm (556 words)

	GON.com - Hunt All Day For A Seminole Canvasback - Georgia Outdoor News
		Canvasback season will be open from December 27 through January 25 with a limit of one bird per day.
		Taxidermist Rodney Casteel of Macon is among the Georgia waterfowlers on a quest for a drake canvasback, and for the way he hunts, he is undaunted by rough weather or by the big crowds.
		Canvasbacks are diving ducks, and the prime area to find them is the open water at the confluence of the Chattahoochee River, Spring Creek and the Flint River.
	www.gon.com /article.php?id=130 (1564 words)

	NPWRC :: Survival of Radiomarked Canvasback Ducklings in Northwestern Minnesota
		If the disparate survival between sexes of canvasbacks observed in this study is representative of canvasbacks in their breeding range, this phenomenon contributes to reduced reproductive potential and the male-biased sex ratio of the species.
		Causes of canvasback duckling mortality were consistent with that reported for other species and included predation (Sargeant and Raveling 1992), adverse weather conditions, inanition, and disease (Table 2).
		However, this source of disease mortality was never as prevalent in canvasback ducklings as in mallards on the Chesapeake Bay (Krementz and Pendleton 1991), where during 1 year of the study, 43% of radiomarked ducklings died of pneumonia.
	www.npwrc.usgs.gov /resource/birds/radiomrk (5707 words)

	Outdoors\Hunting\Canvasback
		Too, and hopefully(optimistically) the canvasback is becoming more adaptable to person made wetlands and staging areas, and that populations continue to grow.
		The canvasback is primarily a solitary bird though, and doesn't like people's activities much, especially in breeding seasons.
		Canvasbacks are a very hardy bird, most often having to be 'pushed' south by bad/cold/stormy/snowy/sleet/freeze-up weather.
	www.execulink.com /~environm/Hunting/Canvasback.html (331 words)

	Canvasback (Site not responding. Last check: 2007-11-03)
		Canvasback installs in seconds: The Liner covers the carpeted cargo area and up the back of the 2nd seat.
		Canvasback NO 3rd is for use with 3rd seat removed going to the back of 2nd seat.
		Canvasback WITH 3rd is a 2 piece goes up the back of the 3rd seat and covers the cargo area behind 3rd seat.
	sportomotoring.com /Results.html?ListID=305652961635807&... (5229 words)

	Canvasback Ducks
		The canvasback (Aythya valisineria) is one of the largest and fastest flying ducks in North America.
		In flight, the male exhibits the most white of any duck and is very distinct with its “canvas” colored back, chestnut-red head, elongated fl bill, and blood-red eyes.
		For the past 25 years, the continental population of canvasbacks has fluctuated around 580,000 individuals, with 25% of that population in the Pacific Flyway.
	desfbay.fws.gov /Archives/Canvas/canvasback.htm (204 words)

	Canvasback
		The Canvasback (Aythya valisineria) is a larger-sized diving duck.
		The adult male has a fl bill, a red head and neck, a fl breast, red eyes and a whitish body.
		Canvasbacks usually take new mates each year, pairing in late winter.
	www.ebroadcast.com.au /lookup/encyclopedia/ca/Canvasback.html (123 words)

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