Denton Slough is a shallow wetland that is part of Pend Oreille Lake. This slough supports many submerged plants, and associated wildlife.

Ornithological Summary

This site supports a nesting colony of Western Grebes (30+ nests). Summer waterbirds also include: Double-crested Cormorants, Great Blue Herons, Canada Geese, and Black Terns. Thousands of waterfowl (American Wigeon, Redhead, Lesser Scaup, Green-winged Teal, Mallard, Tundra Swan, Canada Goose) use Denton Slough during migration.

Conservation Issues

Dam operations continue to alter the natural hydrology at this site, resulting in degraded habitat quality. In addition, easy public access has potential for disturbing breeding birds, as Western Grebes are nesting adjacent to a boat ramp. Although the birds seem fairly habituated to disturbance, their nests may not be able to handle boat wake in the area. In 2005, grebes appeared to attempt nesting several times, moving to a new location within the slough each time, with apparently no success. Although there are no current measures to deal with these threats, this area is covered by the Pend Oreille WMA long-range management plan, and potential exists for devising a way to cut down on disturbance and boat wake problems.


Shallow bay of Pend Oreille Lake. Large biomass of submerged flora in late summer which is used for floating Western Grebe nests.

Land Use

This site is an access point to the lake, generally used by fisherman. Wildlife viewing is also an activity at this site.

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