Busy beavers located in prime time

LANDER, Wyo. — Wyoming Game and Fish recently relocated a family of beavers that were building dams in a ditch.

The dams posed a risk of flooding a campground near Lander. But this beaver family is the perfect age for such a move. Game & Fish says fall is the best time to trap and relocate beavers because young kids are old enough to move around and enter traps, and families are more likely to stay where they are released in order to prepare for winter.

Beavers are social beings, so it is important to relocate as many family members as possible. Separated beavers tend to leave their new homes in search of their family members.

These recently relocated beavers will be busy this month building their lodge and storing supplies for winter. Beaver activity normally increases in the fall as the animals prepare for winter by cutting down trees to repair dams and to store as food. Dams create ponds that protect them from predators and help them store food.

When the water finally freezes over, beavers make a food cache by pushing branches into the mud underwater. During the winter, they swim out from their underwater lodge entrance and bring the trees back to the lodge where they eat the buds, twigs, and bark. They also store fat in their tails that they can use for energy during the winter.  

This particular family of beavers was moved to a stream in the headwaters of the Popo Agie River watershed where old beaver dams exist and plenty of willows and aspen are available for food and dam building. Beavers are vulnerable to predation until they have built dams and a lodge. To increase their chance of relocation success, Game and Fish biologists provided them with a straw bale temporary lodge and cuttings of willow and aspen in the stream.

As beavers build dams for their own survival, the ponds and channels they create have many positive effects on their environment. The ponds provide important wetland habitat for birds, deer, moose, and amphibians and also increase habitat diversity for trout, such as overwintering pools. Additionally, the ponds recharge groundwater, filter sediment, and excess nutrients out of the water, and improve streamside vegetation. That is why beavers are often called “ecosystem engineers.”

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