CHAMPIAN GLOBE TROTTER ARCTIC TERN WAS CONSIDERED TOP NOTCHER AMONG MIGTATORY BIRDS BUT HER TITLE IS NOW CHALLENGED BY ANOTHER GLOBE TROTTER SOOTY SHEARWATER ;INTERESTING PART IS THAT BOTH FLY IN OPPOSITE DIRECTION FOR WINTERING -TERN MIGRATES FROM NORTH TO SOUTH AND SOOTY FRO SOUTH TO NORTH .