The black-throated diver is a large waterbird; it is larger than the great crested grebe, but smaller than the cormorant. Black-throated divers nest on small pools and lochs, moving to the coast in winter, where they feed on fish. It sometimes turns up on big lakes and reservoirs.
How to identify
The black-throated diver looks smart in its summer plumage, with a black throat, silky grey head and neck, and a black-and-white-chequered back. In the winter, it turns a very dark grey above and white below, with an obvious white patch on its rear flanks. It has a straight, dagger-like bill.
Did you know?
The black-throated diver is known in America as the 'Arctic loon'. It can fish at depths of up to six metres, but usually only stays underwater for a minute or so.
