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The Beaver Moon
By Dave Anderson on Friday, November 6, 2009.
November is beaver time. The November 2nd full moon was the “Beaver Moon” to New England's Algonquin-speaking tribes who kept track of seasons by giving distinctive names to each recurring full moon; each moon, a season unto itself. “Beaver Moon” was the time to trap beavers before swamps froze to ensure a winter supply of furs or was named because beavers are most active in November when preparing for winter. Right now, our State's largest rodents are feverishly felling trees to build underwater caches of hardwood branches whose outer bark sustains a beaver colony until ice-out in March. Nearly eliminated by the fur trade, New Hampshire beaver populations are at an historic high, too high for an accurate census. It's ironic that in 1920, The Forest Society sponsored an expedition to Minnesota to live-trap two breeding pairs of beavers for release at Lost River. A decade later, a pair were exhibited as a curiosity at the 1930 Rochester Fair and released afterwards in the Cocheco River. Reintroduction of beavers is a classic success story. Beavers are a "keystone species” whose pond construction benefits a variety of wetlands wildlife. Dead and dying trees killed by flooding benefit a massive variety of bird species. The best beaver ponds cycle on and off for decades, perhaps for centuries. When beavers rebuild old dams to re-flood areas in response to renewed food supplies, it’s rural redevelopment! I've learned another trick from these furry, logger-rodents: beavers store fat reserves in their, um “tails” for the long winter. With the upcoming Thanksgiving holiday nearly upon us, I may employ that same survival strategy! comments
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I love Dave Anderson's excitment for his topic. I just learned some of what the beavers near here are up to--they're busy--as well as the history of beavers. Terrific. And then he puts in a wonderful piece about storing up fat for the winter, to make us all feel better about the approaching eating fest of the holidays. Thank you Dave.
Thank so much for this episode. You answered questions I have always wondered about beavers, like how long does a beaver dam last and ones I didn't know to ask - What is a keystone species? What a treat!
Thanks for listening to my Something Wild segment "Beaver Moon." The question about keystone species is a good one. A "keystone species" (beaver) is one whose presence benefits an array or entire suite of other wildlife species. An "indicator species" (river otter) is one whose presence is a good indicator of environmental quality or habitat conditions. Beavers create habitat for insects, woodpeckers, waterfowl, cavity nesting birds, flycatchers, herons, ospreys, turtles, wood frogs, salamanders, moose, muskrat, etc. Beavers are the keystone through their pond creation. Otters are an indicator of good water quality - they need lots of fish and can travel 50 miles of river so their presence as an "indicator species" is a good proxy for intact riverine habitat. Hope this helps!
- Dave Anderson