Global environmental change and human-made pollution have changed the migration routes of birds, especially storks, according to a new study from the University of East Anglia (UAE).An increasing number of storks no longer migrate from Europe to Africa for the winter, but instead many live in Spain and Portugal the whole year round - feeding on "junk food" from landfill sites, reported the university in a press statement. Addicted to junk food and making round-trips of almost 100 kilometers to get their fix, white storks are now residents, nesting and living near landfill sites all year round. The research team tracked 48 birds using GPS tracking devices which transmit their positions five times a day. "We found that the landfill sites enable year-round nest use, which is an entirely new behavior that has developed very recently. This strategy enables the resident birds to select the best nest sites and to start breeding earlier," said lead researcher Aldina Franco, from UEAtarget="_blank"'>