Climate change already forcing world's birds towards poles, says report

One quarter of 570 bird species studied globally have been affected negatively by climate change, says Birdlife International

The world's birds have begun flocking towards the earth's north and south poles and upwards to higher ground as climate change begins to transform their habitats, a new report has found.

One quarter of 570 bird species studied globally have been affected negatively by climate change, while 13% have responded positively, says the study by Birdlife International.