Eared Grebe
Eared Grebe
Podiceps nigricollis
At a Glance
A common grebe of freshwater lakes in the west. Gregarious at all seasons; nests in dense colonies, sometimes congregates in huge numbers on lakes during migration and winter. Probably as an adaptation to life in the arid west, it is flexible in distribution, quickly taking advantage of temporary or man-made new bodies of water.
All bird guide text and rangemaps adapted from by Kenn Kaufman漏 1996, used by permission of Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Category
Duck-like Birds, Grebes
IUCN Status
Least Concern
Habitat
Coasts and Shorelines, Freshwater Wetlands, Lakes, Ponds, and Rivers, Saltwater Wetlands
Region
California, Eastern Canada, Florida, Great Lakes, Mid Atlantic, New England, Northwest, Plains, Rocky Mountains, Southeast, Southwest, Texas, Western Canada
Behavior
Direct Flight, Rapid Wingbeats, Swimming
Population
3.100.000
Range & Identification
Migration & Range Maps
Migration begins earlier in fall than in Horned Grebe. Generally migrates at night. Some birds migrate southeast from breeding range to winter near Gulf Coast.
Description
12-14" (30-36 cm). Summer plumage known by black neck, buffy-gold "ears" on side of black head. Winter plumage like Horned Grebe but duller, dingier, with darker cheeks, gray on neck, whitish ear patches near back of head. Bill thinner, slightly upturned; head more peaked.
Size
About the size of a Crow, About the size of a Robin
Color
Black, Gray, Red, White, Yellow
Wing Shape
Tapered
Tail Shape
Short
Songs and Calls
On breeding grounds, frog-like cheeping notes.
Call Pattern
Flat, Rising
Call Type
Scream, Trill, Yodel
Habitat
Prairie lakes, ponds; in winter, open lakes, salt bays. Favored nesting areas are lakes or large ponds with extensive marshy borders. Opportunistic, it may quickly occupy new or temporary habitats. During migration and winter, mainly on large freshwater or alkaline lakes. Also on coastal bays, but seen less often on ocean than Horned Grebe.
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Behavior
Eggs
Usually 3-5, rarely 1-6. Whitish at first, becoming nest-stained brown. Incubation (by both sexes) about 21 days.
Young
Leave nest after last egg hatches, are tended and fed by both parents. Adults may separate, each taking part of brood. Young may ride on parents' backs when small. May be independent by 21 days after hatching; age at first flight not well known. One brood per year, rarely 2.
Feeding Behavior
Forages by diving and swimming underwater, propelled by feet. Also takes many insects and other items from surface of water.
Diet
Mostly insects and crustaceans. Feeds on insects (such as aquatic beetles, dragonfly larvae, flies, mayflies), crustaceans, mollusks, tadpoles, a few small fish. During autumn stopover on large alkaline lakes, may feed mainly on brine shrimp. Young are fed mainly on insects. Like other grebes, sometimes eats feathers.
Nesting
Courtship displays are complex. Male and female may swim side by side while turning heads and calling loudly; also face each other while rearing up out of water and turning heads from side to side; at climax of display, pair may rear up to vertical position and rush across surface of water side by side. Nest: Built by both sexes, a floating platform of weeds, anchored to standing vegetation in shallow water.
Conservation
Conservation Status
Populations generally stable, but vulnerable because large numbers depend on just a few major lakes at some seasons (such as Great Salt Lake, Mono Lake, Salton Sea).
Climate Threats Facing the Eared Grebe
Choose a temperature scenario below to see which threats will affect this species as warming increases. The same climate change-driven threats that put birds at risk will affect other wildlife and people, too.