A survey of Scottish birds finds that global warming may be having an effect, with some once-common birds moving north.
The Breeding Bird Survey by the British Trust for Ornithology found that seven species are in marked decline in Scotland, The Scotsman reports. At the same time, other species are becoming more common as their ranges are also forced north into Scotland.
Generally, the declining species are those of higher elevations, the Scottish moors and uplands. Kestrels, lapwings, curlews, meadow pipits and oyster catchers have been placed on the amber warning list.
Numbers of swifts and hooded crows have dropped by more than one-third, the survey found. But because their declines have been observed over a relatively short time they have not yet been put on the warning list.
Graham Appleton of the Trust said many birds are doing well in Scotland.
"Blackcap populations are growing because they are moving north from England while some specialist Scottish breeds are declining because they in turn are shifting further north," he said. "It suggests that the populations are being affected by the climate."
Copyright 2006 by United Press International
Explore further: Study characterizes genetic resistance to wheat disease