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Chris Gomersall

Ospreys nest near water: their preferred prey is fish.

An adult Slavonian grebe in summer plumage. These birds are poor walkers, due to the position of their legs being set far back on their body.

A wading godwits in summer plumage.

The white-tailed eagle is sometimes called the sea eagle, given its preference for fish. It was successfully re-introduced to Britain as part of a 'rewilding' scheme.

Heavy rainfall during the Slavonian grebe's breeding season has seen its numbers decline.