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Eco-photos of the week: Aug. 28-Sep. 3

By: Catie Leary on Sept. 2, 2011, 6:55 a.m.
Gnus scramble across the Mara River at Masai Mara National Reserve in Kenya on Aug. 29.

Photo: ZUMA Press

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Wildebeest migration

A pair of wildebeest scramble across the Mara River at Masai Mara National Reserve in Kenya on Aug. 29.

When grass withers at Serengeti National Park in north Tanzania, the flocks of wildebeests, zebras and antelopes that live there start their annual migration to Masai Mara National Reserve in Kenya.