92 species of birds can't all be wrong

30 March 2013.

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. 

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.

the old den, probably home to a new animal. 30 March 2013.

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:

1. Horned grebe
2. Pie-billed grebe
3. American Bittern
4. Great Blue Heron
5. Canada Goose (breeds in pond)
6. Mallard (breeds in pond)
7. American black duck
8. Green-winged teal
9. Blue-winged teal
10. Wood duck
11. Ring-necked duck
12. Lesser scaup
13. Common goldeneye
14. Bufflehead
15. Common merganser
16. Hooded-merganser
17. Virginia rail (breeds in pond)
18. Killdeer
19. Solitary sandpiper
20. Spotted sandpiper
21. Common snipe (breeds in pond)
22. American woodcock (breeds in pond)
23. Bald eagle
24. Northern harrier
25. Sharp-shinned hawk
26. Broad-winged hawk
27. Osprey
28. Ruffed grouse
29. Wild turkey
30. Mourning dove (breeds in pond)
31. Black-billed cuckoo (breeds in pond)
32. Barred owl
33. Ruby-throated hummingbird
34. Belted kingfisher
35. Northern flicker
36. Yellow-bellied sapsucker
37. Downy woodpecker
38. Hairy woodpecker
39. Pileated woodpecker
40. Eastern kingbird (breeds in pond)
41. Olive-sided flycatcher
42. Eastern Phoebe
43. Least flycatcher
44. Willow flycatcher
45. Alder flycatcher
46. Tree swallow
47. Bank swallow
48. Barn swallow
49. Blue jay (breeds in pond)
50. American crow
51. Common raven
52. Tufted titmouse
53. Black-capped chickadee (breeds in pond)
54. Winter wren
55. Golden-crowned Kinglet
56. Ruby-crowned kinglet
57. Blue-gray gnatcatcher
58. American Robin (breeds in pond)
59. Veery (breeds in pond)
60. Northern shrike
61. Gray catbird (breeds in pond)
62. Bohemian waxwing
63. Cedar waxwing (breeds in pond)
64. Red-eyed vireo
65. Warbling vireo
66. Tennessee warbler
67. Nashville warbler
68. Chestnut-sided warbler (breeds in pond)
69. Yellow-rumped warbler
70. Palm warbler
71. Yellow warbler (breeds in pond)
72. Northern waterthrush (breeds in pond)
73. Common yellowthroat (breeds in pond)
74. American redstart (breeds in pond)
75. Rose-breasted grosbeak breeds in pond)
76. Northern cardinal (breeds in pond)
77. Song sparrow (breeds in pond)
78. American tree sparrow
79. Dark-eyed junco
80. White-throated sparrow
81. White-crowned sparrow
82. Fox sparrow
83. Swamp sparrow (breeds in pond)
84. Red-winged blackbird (breeds in pond)
85. Brown-headed cowbird (breeds in pond)
86. Common grackle (breeds in pond)
87. Northern oriole (breeds in pond)
88. American goldfinch (breeds in pond)
89. Pine grosbeak
90. Common redpoll
91. Purple finch
92. Evening grosbeak

 More later.

squirrels, deer, rabbits, fox, and a beaver. Oh My!

It's spring break so I had the pleasure of my son's company this week. We had a great week, and a very successful one. So let's not waste a lot of time with words. Let's just enjoy the results.

Eureka! Let's enjoy this as long as it lasts.

I checked the camera yesterday afternoon, and again this afternoon. I am glad to report that I've finally caught or favorite rodent on the camera. What fun.

I also observed an interesting phenomenon. 

I saw a tree nearly cut down by the beaver.

When I looked closer, though, I realized that the tree was ready to fall. Sadly for our rodent friend, it was hung up in branches of other trees, so couldn't fall. All that work and no food. Drats.

One last note. While out today I met a man who is attempting to trap the beaver, apparently at the request of the Park Manager. He said that he is going to relocate the beaver if he succeeds in catching it.

More later.

My shortest post ever

So....I went to check on a technical difficulty with the camera this afternoon after work.

the water level is rising. 2013-02-25

I had to cross Minebank run upstream from the beaver dam and pond. The beaver has been busy. I just about 27 hours, the water in the pond has risen about 2 inches. In the photograph to the right, you can see some stones under water. When I used them yesterday to cross the stream, they were about half above the water. Now they are just submerged under the water.

It's a busy little beaver, isn't it?

2013-02-25.

Here is the camera in place. It is overlooking the slide on the west bank of the stream. Maybe one of these days I will actually catch the beaver on the camera. Wish me luck.



More later.

What's new this week

new dam. 2013-02-24.

The beaver is still active in its new location. That's the good news. The continuing news is that I still have failed to capture the beaver with the trail camera. The bad news--nah. It's too nice a day out, and my trail companions of the afternoon were far to nice people to have bad news.

We had a nice afternoon nosing around and made some observations. We did not observe a beaver lodge or den. Perhaps, the beaver is living somewhere in this mess of sticks piled up on a fallen tree? You can see the pile on the left of this picture. There is another on the opposite bank, not visible in this picture. You can't see it, but the dam is behind the fallen tree. This photograph is looking downstream. You might also observe the evidence of heavy flooding along the stream and it's banks. Notice that some of the banks are undercut by the heavy currents? Trees are falling in to the stream.

Stormwater is the only source of pollution to in the Chesapeake Bay that is increasing.

the new entrance to the old den.

The old dam is almost gone. Still lodged behind what is left of it is a lot of silt. The old beaver lodge is still visible, and so is the hole that some other animal has dug, presumably to reuse it as a new home. Perhaps when the weather, and the water, warms, I will get in the stream and try to find the beaver's entrance tunnel. It is not visible from either bank.

leftovers from someone's dinner.

We also saw some deer bone that some animal has dragged on to the path. I don't know if this is from a wild animal or a dog. A great number of dogs are led along this path. I wonder what the beaver thinks of so many dogs running over its home? They haven't caused it to leave yet.

Finally, even though I have failed to record a beaver with the trail camera, we do have red fox in the area.







More later.

Good news. He didn't leave, he just moved....

silt is visible on the left bank, and the pond is full of silt.

I checked on the abandoned dam Saturday. Conditions there are about the same. I did notice that the dam captured a lot of silt. And this in a stream that has been "restored". Without the beaver dam, this silt would have washed downstream. And you already know, I am sure, that downstream is the Chesapeake Bay.

Seems to me that we have a lot of work to do to improve urban water quality.

I also checked the camera that I had left in place to see if it could pick up whatever critter has moved in to the abandoned beaver den. It failed at that, but did pick up some other wildlife in the area.

the new dam. 2013-02-16.

The the good news. I learned from the park staff that rumor has it that there is beaver activity further downstream. It's not just rumor; it's fact. About 320 feet downstream from the first dam, I found another, smaller one.

I also found several trees cut down by the beaver. It is certainly trying to make a new home for itself.

The camera is in place, overlooking the area where the beaver is cutting down trees.





I don't know what will happen here, though I suspect that this dam, like the previous, will be destroyed by flooding. Time will tell, and I will keep looking.

Meanwhile, you are more than welcome to use any image or text in this blog is free for any educational purpose.

More later.

Sad news, and whither the critter cam next?

I checked on the beaver's dam today, and made some observations.

The abandoned dam.

The dam appears to be abandoned. It's even smaller than last week, and shows no signs of having been improved by the beaver.

the den.

The beaver's den also appears untended.














I checked the beaver slides, those trails where the beaver from the stream to dry land. I saw no tracks. Similarly, I walked upstream on both banks of the stream about 200 yards and saw no new trees cut down.

silt collected by the dam.

I did look at the beaver pond just behind the dam. This photograph may not show it well, but there appears to be a great deal of silt collected by the dam. This is evidence of the damage done to streams by urbanization, and also evidence of how beaver dams, can help the environment. They trap this sediment, and keep it from racing downstream toward the Chesapeake Bay.

Conclusion: the last storm was one too many for our rodent friend, so it's gone. I have no doubt that it considers itself evicted by the landlord called urban stream flooding. I did not walk the entire stream, so I don't know if it has just moved a little bit and is going to try again on Minebank Run. Which leads to a new goal for this year. Minebank Run is a little under 4 miles from headwaters to mouth. I think I will walk the entire length one day this year. Seems like it might be fun.

The new entrance hole to the beaver's den.

But, nature abhors a vacuum, doesn't it? Already I see a new hole leading into the beaver's den. Another animal has already moved in. I hope the landlord will be more accommodating to the new tenant.

The camera is set up overlooking the den. I may get a glimpse of the new tenant. But, I may not as the camera is about forty-five feet away. That's a long way for a trail camera. It's also the closest tree that wasn't cut down by the beaver.




The Cromwell Critter Cam is not done, even if the beaver is. I intend to keep the camera out, and to keep seeing what there is to be seen in Cromwell Valley Park.

More later.