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Mallard
Mallard populations. Mid-continent Mallard populations are used for Adaptive Harvest Management (USFWS) where computer models take environmental changes and biological responses over a year to predict populations ...
deltawaterfowl.org

Prairie Pothole Region
The potholes are rich in plant and aquatic life, and support globally significant populations of breeding waterfowl. Agricultural development caused considerable wetland drainage in the area. The ... during breeding are the most important factors responsible for change in mid-continent mallard populations. The PPR provides important breeding habitat for pintails, mallards, gadwall, blue-winged teal, ...
ducks.org

Mallard Facts, Figures, Description and Photo
Its wide range has given rise to several distinct populations. Male: The male mallard ... -term average. Mallard populations have benefited greatly from the Conservation Reserve Program (CRP) and other grassland restoration efforts in the northern prairies of the USA, where populations have increased 100 ...
ducks.org More from this site

Safe Houses - Thanks to a conservation group, Minnesota mallard hens will find more predator-free places to lay their eggs.
Minnesota become ducklings. At that rate, scientists say, Minnesota's mallard population isn't growing — it's barely staying even ... per fledged mallard, Rave said. But he still considers the houses cost-effective. "Hen houses are one of the cheapest ways for producing mallards," he said. "They help bolster local mallard populations in ...
deltawaterfowl.org

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U.S. Fish and Wildlife report released Thursday. Mallard populations were about the same as last year. The news reflects a dramatic turnaround in ... western Saskatchewan, Manitoba and Alberta, which bodes well for duck production. "Data on breeding duck populations from Canada and other states is not yet available, but preliminary reports suggest generally ...
greatlakesdirectory.org

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The mallard breeding population in Minnesota this spring was estimated at 281,000, which is 23 percent less than last year. "This was the first year since 1991 that mallard populations in Minnesota have been below 300,000, but populations remain 29 percent above the average since the current waterfowl survey ...
greatlakesdirectory.org More from this site

Poster Abstracts from USGS Patuxent Wildlife Research Science Meetings, October, 2006
Comparing mallard population indexes in the Mississippi Alluvial Valley between January 1988-1990 and 2005-2006 Reinecke KJ, Pearse A, Kaminski R Since 1995, mallard populations have ... perceptions about mallard populations should be positive. Nevertheless, controversy has increased regarding the abundance and distribution of mallards in the MAV. Perceptions are that mallard winter populations have ...
www.pwrc.usgs.gov

EMS - Environmental Entomology - Invertebrate Surveys and Conservation - Bird and Insect Databases
Alca torda Linnaeus 1758 Razorbill northern populations mainly migratory, southern populations dispersive dispersive Norwegian seas disperse August to November, adults back in colonies in February ... overlaps with others n/k n/k n/k communal on water; some associate with mallard, teal, shoveler and gadwall 0 < 3 1 < 3 3 < 2 1 < 2 n/a n ...
www.environmental-entomology.co.uk

WDNR - DNR Outdoor Report - August 7, 2008
Snakes play an important role in our eco-system, helping keep rodent populations in check and providing a food source for natural predators, such as birds of ... hummingbirds, scarlet tanagers, a variety of wrens, red polls, bluebirds, lake gulls, golden finches, mallard ducks, common loons, great blue herons, red winged blackbirds, phoebes, Canada geese, sandhill cranes, ...
www.dnr.state.wi.us

U.S. Global Change Research Information Office
For example, mallard ducks introduced to the Hawaiian islands for hunting have hybridized extensively with the native, ... other Pacific islands in a futile attempt to control the giant African snail, has devastated populations of several native Hawaiian snails. The mosquito fish (Gambusia affinis and G. holbrooki ) has been ...
gcrio.org