Assertion: otter's population | /r/HasProperty | little grebe
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Source sentences:
text: The wintering population of wildfowl and waders includes redshank, greenshank, dunlin, common sandpiper, ringed plover, grey plover, curlew, snipe, water rail, wigeon, teal, shelduck, brent goose, red-breasted merganser and little grebe.