What do western grebes eat?

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Slavonian, or horned, grebe (Podiceps auritus) — Grebe Slavonian, or horned, grebe (*Podiceps auritus*)

The western grebe (Aechmophorus occidentalis) feeds largely on fish. Like other grebes, its diet consists almost entirely of animal matter.1

Additionally, these birds are known for swallowing feathers, which they maintain in their stomachs to form a plug. This plug helps filter material passing to the intestine and holds fish bones in the stomach until they are digested.1