page_title: Beaver dam
section_title: Stream life cycle
hierarchical_section_title: Beaver dam / Stream life cycle
caption_attribution_description: A beaver dam in Allegheny State Park NY has burst and the beaver pond been drained of its water.
context_page_description: Beaver dams or beaver impoundments are dams built by beavers to provide ponds as protection against predators such as coyotes, wolves, and bears, and to provide easy access to food during winter. These structures modify the natural environment in such a way that the overall ecosystem builds upon the change, making beavers a keystone species. Beavers work at night and are prolific builders, carrying mud and stones with their fore-paws and timber between their teeth.
caption: Drained beaver pond in Allegany State Park
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