Diet Overlap

Aythya americana (Redhead)
Charadrius semipalmatus (Semipalmated Plover)

Common Diet

Astyris lunata (lunar dovesnail)
Japonactaeon punctostriatus (apitted baby-bubble)
Phrontis vibex (bruised nassa)
Pyrgocythara plicosa (plicate mangelia)

Common Habitat

Aleutian Islands Biosphere Reserve
Algonquin Provincial Park
Alto Golfo de California y Delta del Rio Colorado
Apostle Islands National Lakeshore
Arkansas Post National Memorial
Assateague Island National Seashore
Audubon National Wildlife Refuge
Badlands National Park
Baja California desert
Banff National Park
Big Bend Biosphere Reserve
Big Cypress National Preserve
Blackbeard Island National Wildlife Refuge
Blackwater National Wildlife Refuge
Bombay Hook National Wildlife Refuge
Bruce Peninsula National Park
California Coast Ranges Biosphere Reserve
California coastal sage and chaparral
California Floristic Province
California interior chaparral and woodlands
California montane chaparral and woodlands
Canaveral National Seashore
Cape Cod National Seashore
Cape Hatteras National Seashore
Cape Lookout National Seashore
Cape Romain National Wildlife Refuge
Carolinian-South Atlantic Biosphere Reserve
Central American dry forests
Central Gulf Coastal Plain Biosphere Reserve
Central Plains Biosphere Reserve
Chattahoochee River National Recreation Area
Chickasaw National Recreation Area
Colonial National Historic Park
Creighton Ranch Preserve
Crosswinds Marsh
Curecanti National Recreation Area
Death Valley National Park
Deer Flat National Wildlife Refuge
Denali Biosphere Reserve
Effigy Mounds National Monument
Elk Island National Park
Elkhorn Slough Preserve
Everglades
Fathom Five National Marine Park
Fort Pulaski National Monument
Gateway National Recreation Area
Georgian Bay Islands National Park
Glen Canyon National Recreation Area
Grand Canyon National Park
Grasslands National Park
Gray Lodge State Wildlife Area
Great Basin National Park
Gulf of California xeric scrub
Gwaii Haanas National Park Reserve
Horicon National Wildlife Refuge
Hot Springs National Park
Indiana Dunes National Lakeshore
Interior Alaska-Yukon lowland taiga
Interior Yukon-Alaska alpine tundra
Jalisco dry forests
Jasper National Park
Kluane National Park and Reserve
Lacassine National Wildlife Refuge
Lake Mead National Recreation Area
Lake Meredith National Recreation Area
Lake Roosevelt National Recreation Area
Lake Superior Provincial Park
Land Between the Lakes Biosphere Reserve
Little St. Simons Island
Long Point Biosphere Reserve
Mesoamerica
Mid-Continental Canadian forests
Middle Atlantic coastal forests
Mojave and Colorado Deserts Biosphere Reserve
Mount Arrowsmith
Muskwa-Slave Lake forests
Nahanni National Park Reserve
Niagara Escarpment Biosphere Reserve
North America
Northern Canadian Shield taiga
Ogilvie-MacKenzie alpine tundra
Olympic Biosphere Reserve
Organ Pipe Cactus Biosphere Reserve
Padre Island National Seashore
Paine Preserve
Pantanos de Centla
Petén-Veracruz moist forests
Pictured Rocks National Lakeshore
Point Pelee National Park
Point Reyes National Seashore
Prince Albert National Park
Pukaskwa National Park
Redberry Lake Biosphere Reserve
Redwood National Park
Reserva de la Biosfera El Vizcaino
Riding Mountain Biosphere Reserve
Rocky Mountain Biosphere Reserve
Rondeau Provincial Park
Saint Croix International Historic Site
Saint Lawrence Islands National Park
Salt Plains National Wildlife Refuge
San Lucan xeric scrub
Santa Monica Mountains National Recreation Area
Santee Coastal Reserve and Washo Reserve
Shortgrass Steppe LTER Site
Sierra de la Laguna dry forests
Sierra de los Tuxtlas
Sinaloan dry forests
Sleeping Bear Dunes National Lakeshore
Sonoran desert
Sonoran-Sinaloan transition subtropical dry forest
South Atlantic Coastal Plain Biosphere Reserve
Southeastern conifer forests
Southern Pacific dry forests
Tamaulipan mezquital
Tawas Point State Park
Upper Miss. River Nat'l Wildlife Refuge
Valley Forge National Historical Park
Veracruz dry forests
Veracruz moist forests
Virginia Coast Biosphere Reserve
Waterton Biosphere Reserve
Western Gulf Coastal grasslands
Wheeler National Wildlife Refuge
White Sands National Monument
Wrangell-St. Elias National Park and Preserve
Yellowstone Biosphere Reserve
Zion National Park

Attributes / relations provided by
♦ 1FOOD HABITS OF REDHEADS (AYTHYA AMERICANA) WINTERING IN SEAGRASS BEDS OF COASTAL LOUISIANA AND TEXAS, USA, MICHOT, T. C., WOODIN, M. C. and NAULT, A. J., Acta Zoologica Academiae Scientiarum Hungaricae 54 (Suppl. 1), pp. 239–250, 2008
♦ 2Cirtwill, Alyssa R.; Eklöf, Anna (2018), Data from: Feeding environment and other traits shape species' roles in marine food webs, Dataset, https://doi.org/10.5061/dryad.1mv20r6