Carl de Souza/AFP
Herds of wildebeest cross the river in Masai Mara on Friday. Every year hundreds of thousands of wildebeest make the crossing from the Serengeti to Masai Mara game reserve to graze during the migration
Herdsmen ride as they migrate to the summer pasturing areas in a mountainous region in Altay Prefecture, Xinjiang Uighur Autonomous Region
Pelicans rest as the sun sets behind a water reservoir in Emek Hefer, north of the Israeli city of Tel Aviv. Thousands of migrant Pelicans pass though Israel on their way to Africa, and go back to Europe in summer
Wild geese fly over a farm field in Xanten, Germany. The geese migrated from Siberia to stay in the lower Rhine area over winter.