Among the waders, avocet, stone-curlew, little ringed plover and Kentish plover are absent, but most of the 100 or so pairs of dotterel in the UK spend their summers in Scotland as do all of the breeding Eurasian whimbrel, greenshank and red-necked phalarope, (although the latter two species also breed in Ireland). In summer the shallow lochs of the machair lands in the Uists and Benbecula provide for a remarkable variety of waders and ducks including shoveler and eider. The rare Slavonian grebe and common scoter breed on a small number of lochs in Highland region. Goldeneye have colonised an area centred around the Cairngorms National Park since the 1970s, and about 100 pairs breed there. The majority of the roughly 25,000 whooper swans in the British Isles winter in Scotland and