Storks have traditionally migrated from Europe in the autumn, heading south to wintering grounds in sub-Saharan Africa before returning north in springtime to breed. But abundant food found on landfill sites, coupled with warmer weather due to climate change, has led the vast majority of storks in Portugal to skip this arduous journey and stay put all year. In spring and summer they often nest on chimneys or electricity pylons, which humans have helped make safer for them. IMAGES AND SOUNDBITES ARRANGED IN SEQUENCES