Eared Grebe
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They get their name from their dark black necks and breeding plumage, which features ochre-colored feathers around the ears and ear coverts.

Eared grebes are the most abundant grebes in the world and often flock or nest in large numbers that can number in the thousands.

Eared grebes engage in brood parasitism, with nearly 40% of nests containing eggs from more than one female.