water loss. Under extreme conditions, some are able to aestivate in chambers under ground.

Kangaroo rats have large hind feet with long metatarsals and no first digits. With these they bound around not using their fore feet at all for locomotion. Pocket mice are smaller and can also move with leaps but they normally run around on four limbs. Members of the genus Heteromys, the spiny pocket mice, move around on all fours and do not leap at all.

Ecology

Kangaroo

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