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30 March 2013.
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I checked on the camera today, and am delighted to see that the beaver is still active.
It is still chomping on the big tree that it has been chomping on for a couple weeks. This is , by far, the biggest tree in Cromwell Valley Park that it has cut down or tried to cut down. I don't know if that is significant or not. One source I checked says that beavers only cut down large tree when smaller ones are unavailable. That does not seem to be the case here.
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| the old dam. 30 March 2013. |
I also took a walk down to the first dam and den that the beaver built. You may recall that a flood at the
end of January, forced the beaver to look elsewhere for a home. The remnants of the dam are still visible, but with a large hole eroded in the center. Similarly, the den is still visible, but the hole made by an animal has eroded, and is filled with sticks.
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| the old den, probably home to a new animal. 30 March 2013. |
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| the collapsed secondary entrance hole. 30 March 2013. |
So, we all know that beavers destroy a lot of trees. But they do more than destroy. They create as well.
Bernd Heinrich, studying geese living in a beaver pond, found 92 species of birds in the pond. He counted 28 of them using the beaver-created habitat for breeding. (
The Geese of Beaver Bog, Bernd Heinrich) His list is below:
- Horned grebe
- Pie-billed grebe
- American Bittern
- Great Blue Heron
- Canada Goose (breeds
in pond)
- Mallard (breeds in
pond)
- American black duck
- Green-winged teal
- Blue-winged teal
- Wood duck
- Ring-necked duck
- Lesser scaup
- Common goldeneye
- Bufflehead
- Common merganser
- Hooded-merganser
- Virginia rail (breeds
in pond)
- Killdeer
- Solitary sandpiper
- Spotted sandpiper
- Common snipe (breeds
in pond)
- American woodcock (breeds
in pond)
- Bald eagle
- Northern harrier
- Sharp-shinned hawk
- Broad-winged hawk
- Osprey
- Ruffed grouse
- Wild turkey
- Mourning dove (breeds
in pond)
- Black-billed cuckoo
(breeds in pond)
- Barred owl
- Ruby-throated
hummingbird
- Belted kingfisher
- Northern flicker
- Yellow-bellied
sapsucker
- Downy woodpecker
- Hairy woodpecker
- Pileated woodpecker
- Eastern kingbird (breeds
in pond)
- Olive-sided
flycatcher
- Eastern Phoebe
- Least flycatcher
- Willow flycatcher
- Alder flycatcher
- Tree swallow
- Bank swallow
- Barn swallow
- Blue jay (breeds in
pond)
- American crow
- Common raven
- Tufted titmouse
- Black-capped
chickadee (breeds in pond)
- Winter wren
- Golden-crowned
Kinglet
- Ruby-crowned
kinglet
- Blue-gray gnatcatcher
- American Robin (breeds
in pond)
- Veery (breeds in
pond)
- Northern shrike
- Gray catbird (breeds
in pond)
- Bohemian waxwing
- Cedar waxwing (breeds
in pond)
- Red-eyed vireo
- Warbling vireo
- Tennessee warbler
- Nashville warbler
- Chestnut-sided
warbler (breeds in pond)
- Yellow-rumped
warbler
- Palm warbler
- Yellow warbler (breeds
in pond)
- Northern
waterthrush (breeds in pond)
- Common yellowthroat
(breeds in pond)
- American redstart (breeds
in pond)
- Rose-breasted
grosbeak breeds in pond)
- Northern cardinal (breeds
in pond)
- Song sparrow (breeds
in pond)
- American tree
sparrow
- Dark-eyed junco
- White-throated
sparrow
- White-crowned sparrow
- Fox sparrow
- Swamp sparrow (breeds
in pond)
- Red-winged
blackbird (breeds in pond)
- Brown-headed
cowbird (breeds in pond)
- Common grackle (breeds
in pond)
- Northern oriole (breeds
in pond)
- American goldfinch (breeds
in pond)
- Pine grosbeak
- Common redpoll
- Purple finch
- Evening grosbeak
More later.