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Eco-photos of the week: July 31-Aug. 6

Aug. 5, 2011, 7:28 a.m.
A massive herd of wildebeests wade through the Mara River at Maasai Mara National National Reserve in Kenya on July 31.

Photo: ZUMA Press

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Migrating to Maasai Mara

A massive herd of wildebeests wade through the Mara River on July 31 at Maasai Mara National National Reserve in Kenya.

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