Upland birds have shown the largest declines at around 20 per cent. Long-term changes in upland bird populations have been ...

Painted lady butterflies are world travelers. The ones we encounter in Europe fly from Africa to Sweden, ultimately returning to areas north and south of the Sahara.

Now is the perfect time to see the amazing spectacle in California as snow geese start their return migration north to Canada and Alaska.

The findings challenge previous assumptions about butterfly migration and highlight the role of phenotypic plasticity.