Why blackcaps altered their migration pattern

EXPLOITATION and global warming are changing habitats worldwide. Many plants and animals are in trouble, writes Richard Collins.

Birds, being able to fly, cope better than most. Fulmars, for example, began breeding on Irish sea-cliffs in 1911. A new food source, offal from trawlers and whaling ships, had tempted them to venture south of sub-Arctic waters. Few Bewick’s swans from Siberia spend the winter in Ireland nowadays; with a warming climate, they no longer need to come this far.