The Wolf Intelligencer


Beaver (Castor canadensis) North American


Predation of a Beaver (Castor canadensis) by a Gray Wolf (Canis lupus) during Winter. Hernández DL, Bump JK. The American Midland Naturalist. 2022 Jan


Wolf predation of beaver is common in boreal ecosystems, but predation events are thought to be rare in winter. We describe the encounter of a recent wolf predation event of a beaver during conditions of ice cover. The beaver had a broken upper incisor, which may have contributed to it foraging on land during the winter. While it is common for injured animals to have increased vulnerability to predation, injuries can also influence foraging decisions that may indirectly increase vulnerability to predation.

Comparison of Activity Patterns for American Beavers, Gray Wolves, and Muskrats. Lorenz, M.L., 2021


American beavers (Castor canadensis) share the same niche as muskrats (Ondatra zibethicus) by creating lodges and they compete with one another when their vegetation needs overlap. Beavers face predation from gray wolves (Canis lupus). The prediction is that beavers adjust their activity pattern in order to reduce competition with muskrats and to avoid predation from gray wolves. Activity patterns were found by using the Snapshot USA database. Beavers share the same nocturnal activity pattern with muskrats and gray wolves have cathemeral patterns that most likely adjust to the available prey’s schedule. This research has revealed that beavers have a definitive schedule that is not heavily affected by competition or predation, but more research may need to be done where an overlap of beavers with muskrats or gray wolves is more well known.

The forgotten prey of an iconic predator: a review of interactions between grey wolves Canis lupus and beavers Castor spp.
TD Gable, SK Windels, MC Romanski… – Mammal …, 2018

Do wolves ambush beavers? Video evidence for higher‐order hunting strategies
TD Gable, T Stanger, SK Windels, JK Bump – Ecosphere, 2018 – Wiley Online Librar

Where and How Wolves (Canis lupus) Kill Beavers (Castor canadensis); Thomas D. Gable, Steve K. Windels, John G. Bruggink, Austin T. Homkes; PLOS; December 19, 2016

Natural and historical variability in fluvial processes, beaver activity, and climate in the Greater Yellowstone Ecosystem; L Persico, G Meyer – Earth Surface Processes and Landforms, 2013 – Wiley Online Library

The history and current status and distribution of beavers in Yellowstone National Park
DW Smith, DB Tyers – Northwest Science, 2012 – BioOne

Aspen and willow restoration using beaver on the northern Yellowstone winter range
SD McColley, DB Tyers, BF Sowell – Restoration Ecology, 2012 – Wiley Online Library