Archive for October, 2012

Friends in damp places

Posted by heidi08 On October - 31 - 2012Comments Off on Friends in damp places

Storm Sends Beavers into Pentagon City Streets

Humans aren’t the only ones suffering the effects of Superstorm Sandy. The storm apparently forced some beavers out of their habitats and into the streets of Pentagon City.

A few residents who live in a condo complex on S. Hayes Street were about to head out this morning when they were surprised by a wet, furry visitor.

The residents called animal control upon encountering the beaver scurrying from door to door. Desiree Lomer-Clarke said the animal control worker who came to the scene reported having to deal with two other beavers earlier this morning.

Wow, that qualifies as the kindest possible reception to some stray beavers from our friends in Virginia. Considering that folks were water soaked and very recently had the most famous rabid beaver attack in the history of the world  just 7 miles away in Lake Barcroft, this was truly unexpected kindness.

The displaced beavers were not acting in an erratic manner to suggest they would have rabies — as happened twice this summer during beaver attacks in Fairfax County — so they were released near their homes.

As the area’s water levels return to normal, Zell said the beavers that wandered Pentagon City should be able to once again inhabit their dens. If the dens were damaged or destroyed by the storm, the animals should adjust easily to a new habitat.

Sounds like Mr. Zell is a friend of ours. You have to wonder what were the compassion strings that got pulled behind the scenes to let this happen so smoothly. Well, I never look a beaver gifthorse in the mouth. Thanks Pentagon city for showing some uncommon sense in a time of watery distress!

And to follow up on the dragonflies in beaver ponds report here’s a fantastic poster from their work in Germany. Click on the image for a better look.

Click for larger poster


In the Shadow of Sandy

Posted by heidi08 On October - 30 - 2012Comments Off on In the Shadow of Sandy

Flooding at Ground Zero Construction Site

Amidst the hurricane-meets-blizzard story that rocked the Atlantic coast yesterday, I hope you gave a thought to our beaver champions, who are sprinkled along the east coast like hardy wildflowers, bringing a touch of much needed color to their shores. I actually just heard from Mike Callahan of Beaver Solutions that he is trapped in London by Sandy and unable to get home. He is wondering if  there will be a Beaver Solutions truck when he gets back. Let’s also give a thought to Sarah Summerville of the Unexpected Wildlife Refuge in New Jersey, who has likely seen an unbelievable night.

Yesterday a ‘thank you’ package arrived from Sharon and Owen Brown of Beavers: Wetlands and Wildlife who visited earlier this month. It contained a very nice letter, several beaverish treats and a copy of their new DVD called Meet the Beaver! It’s a charming story of the beavers they hand raised and the impact beavers have on the environment. It also has footage that made me, whose watched beavers for 5 years, catch my breath. If I were you, I would march right over the the BWW website and implore to purchase your own. It’s not listed for sale yet, but I’m sure they’d be thrilled to sell you an advance copy. Their note said that I could share a little taste with you, and I knew just what flavor belonged. I know that sometimes I post videos that nobody watches but you honestly CAN’T miss this. Enjoy!

Isn’t that cool? What on earth is that toad doing? It’s not like he can’t swim or he needs the rest! It made me think me of the gingerbread man getting a ride from the fox. Remember that scene? Of course toads don’t dissolve in water and beavers don’t eat them, but still….

Now if that whet your appetite for some longer footage, check out Michael Foster’s newest piece on the San Pedro river. See how many different species you can name! He’s such an excellent wildlife photographer that its always a treat to look at his footage. (No Toad-riders though!) That weird little creature is a koati which we don’t have and you should really see up close for yourself some day.

Our River: A Work in Progress from San Pedro River Videos on Vimeo.

St. George and the Dragonfly

Posted by heidi08 On October - 29 - 2012Comments Off on St. George and the Dragonfly

Brought to our attention by our beaver friends in Wales but based on a study  conducted in Germany

The effect of the Eurasian Beaver on Dragonflies and Damselflies (Odonata)

In order to compare beaver ponds with woodland streams representative of large areas north of the Alps, but yet not influenced by the beaver, we studied the following habitat types:

1. Natural springs (definite woodland springs)
2. Streams (natural – semi-natural in woodland, not influenced by the beaver)
3. Beaver ponds (some 10 -15 years old, up to 2000 m², sunny to half-shaded).
4. Beaver ponds abandoned for 1 to 3 years.

Now, being as that I’ve been watching our own beaver ponds for the last 5 years and have seen the density of dragonflies wholly influsenced by the quality and quantity of dams, I’m going to guess the answer to this research question before I get to the end of the story. The year that our dams and lodge were totalled, and mom was dead and dad took off for a while, there was a huge drop in our summer aviators – partly because everything they wanted to eat was washed away. But let’s see what they found anyway? (And by the way, if you’re like me you would appreciate a reminder of the difference between dragonflies and damselflies) when at rest damselfly wings lay parallel to the body, while dragonflies are still perpendicular like airplanes. Now with that out of the way, lets read on:

Conclusion

Despite the relatively short period of time since the return of the beaver, and the rather small number of beaver ponds, the ponds already now make a remarkable contribution to the conservation and spread of rare dragonfly and damselfly species.

Beavers contribute markedly to nature and species conservation in the densely settled countryside of Central Europe. The species should therefore be more greatly integrated into plans to implement conservation measures and renaturisation of water bodies than it has been to date.

Particularly notable are:

– The extraordinary combinations of species (boreal alongside sub-Mediterranean species)
– The extremely different habitat requirements of the species

– The increase in typical stream dragonflies and damselflies in spite of damming by the beaver
– The increase in part of highly endangered species




Steve Wheeler: Coitus Interruptus




Are you shocked? Me neither! Being that dragonflies eat the kinds of things that hatch in beaver ponds, it should be a surprise to no one that they actually do better with some beavers around to make and maintain the ponds. Still, we are always grateful when someone goes to the trouble of documenting the obvious, because it is apparently very hard for some people to see even with proof.

A dragonfly is a remarkable predator. Once I sat in the sun and a slender blue example decided to sit on my knee, and use that perch as a landing pad for his continued predation.  He would wait with little twitches of his tale, discoball eyes on the gnats floating around my garden, spy one that looked a likely target and ZOOM zap out of his perch to snap the gnat up mid-flight and then settle again on my knee perch while he was still swallowing. He would repeat this as long and as often as I watched or waited. I remember once a million years ago rescuing a drowning dragonfly in my canoe off mirror lake in Lassen, and allowing its drenched form to dry in the sun while I paddled about. While the soaking creature dried at close range I was very surprised to learn that even though dragonflies have pretty remarkable wings,  when you are in any proximity to them you realize fairly quickly that are also really big carnivorous bugs.

So there are more kinds of dragonflies and damsel flies at beaver ponds? Gee, I guess there must be things that eat these creatures too! Someone should do a study on whether their populations go up near a beaver pond next!