grebe
US /ɡriːb/
UK /ɡriːb/

1.
mergulhão
a diving waterbird of the family Podicipedidae, with a pointed bill and lobed toes, typically having a glossy dark back and a pale underside.
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The grebe gracefully dove beneath the water's surface.
O mergulhão mergulhou graciosamente sob a superfície da água.
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We spotted a pair of grebes nesting by the lake.
Avistamos um par de mergulhões nidificando perto do lago.