Friday, October 29, 2010

Crap. The Squirrels found out about the Videos.

Posted by Kirk
Some of you may have noticed an abundance of squirrel videos lately. There was the young albino squirrel video which was followed up by a second of higher quality. Next came the white-footed squirrel video. Going way back there was even the squirrel with the abs of steel.

Apparently the squirrels have noticed.



~Kirk
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Tuesday, October 26, 2010

Rare White-footed Gray Squirrel

Posted by Kirk 10 Comments
Some of you have been following along with my videos of a pair of albino squirrels that were born at work. I have yet to get the two of them on camera at the same time but who knows. Maybe some day. Imagine the excitement for albino squirrel afficianatos (and shut-ins in general.)

Well hold you hats squirrel lovers. This video's coming at you. Put on your 3D glasses. (note: Video is not actually in 3D)

What we have here is some fresh video of an unusual white-footed gray squirrel Sciurus carolinensis. The feet of a gray squirrel are usually gray like the rest of the body so it is curious that this one has such white feet. I did a less than exhaustive google search and could find no record of any white-footed gray squirrels. This is either stunningly rare or of all the billions of people on the internet I am the only person to care about a squirrel with white feet. Interestingly, I believe this squirrel was born in the same litter as the albino squirrels. Albinism is systemic however so the two abnormalities should, in theory, not be related. The white feet are either a natural color variation taken to the extreme or perhaps some sort of underlying leucism.



~Kirk
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Friday, October 22, 2010

Wax Worm Tacos

Posted by Kirk
I was trying to look up some facts this week at work on how much land it takes to grow various food sources. I do a class on the difference between primary consumers and secondary consumers. I wanted to find some good sources of information on how many acres of land it takes to make a hamburger versus, say, a soy burger or salad. These number seem pretty hard to come by as there are a lot of variables to take into consideration.

What I did come across was this article from PopSci stating that humanity needs to start farming bugs for food. Interesting idea. I have kids eat dry roasted crickets in my survival summer camp. We dip them in chocolate and the kids gobble them down. One or two kids won't eat them. (I would have been that kid.) They really aren't too bad though I have to admit, there is a bit of a yuck factor. I'll take a cookie any day. I'm sure some ground crickets would add protein to the cookies though and that would be great! There are probably bugs in my cookies anyhow.

I came across this clip below by reading the comments on the article. Most of the comments are barely coherent rants from meat eaters who seemed to miss the point of the article but this video is a gem. Daniella Martin, from Girl Meets Bug, shows us how to cook up wax worm tacos. Probably wouldn't fly at my house but cool none the less. Enjoy.





~Kirk
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Tuesday, October 19, 2010

Better Albino Squirrel Video

Posted by Kirk
So many people liked the albino squirrel video from last week I decided I needed a better video. The last one was shot on a point and shoot camera on video mode so it wasn't the best. Here's a new video with my actual video camera. The squirrel was at the Lee & Rose Warner Nature Center in Minnesota. The site is for school groups and is not open to the public. I discovered shortly after posting the first video that there are actually two albino squirrels from the same litter and on occasion they both hang out together at the feeders. I was only able to get one on film.

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Wednesday, October 13, 2010

Young Albino Squirrel

Posted by Kirk
This little guy was clearly born this year as you can tell by his sub-adult size. Eastern Gray Squirrels Sciurus carolinensis, take 8 to 9 months to reach full size. This one has a few siblings around at the feeders as well. We get albino squirrels showing up every few years so the gene must be passing around in our gray squirrel population at work. I shot a quick video with a small camera. Sorry, not the best quality as my good video camera wasn't on hand. It will be fun to watch it grow up. We do have owls around and, at least until the snow comes, this one will be an easy target. Albino squirrels certainly have an adaptive advantage in the winter given their white coats. It makes me wonder if white squirrels are more common at higher latitudes or altitudes given the positive evolutionary pressure brought on by increased chance of survival in winter. I couldn't find any research on this. I did discover that melanistic or black squirrels are more common as you move north.

This individual is a true albino and not a leucistic squirrel. This means that the pigment is missing from the eyes as well and I have read this could reduce the squirrels visual abilities in bright light. In winter, the reflected sun on the snow is very bright so that could negatively affect survival rates. Interesting any way you look at it.




~Kirk
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Monday, October 11, 2010

Top Ten Nature Myths Debunked

Posted by Kirk 5 Comments
This post has been brewing for a good while. As an interpretive naturalist I not only hear all kinds of myths regurgitated by the public, I field confused questions from people who's cherished childhood beliefs about how the natural world works have been called into question. Here's the straight scoop on the top ten nature myths out there.

Amselnest lokilechBirds Sleep in Nests
I blame Big Bird for this one. The big yellow muppet may snooze away in his nest on Sesame Street but simply put, nests are for incubating eggs and raising fledgling birds, not sleeping. They are not a bird's "home." Birds that are not actively incubating eggs don't sleep in nests. Most (but not all) birds sleep by simply standing or "roosting" on tree branches. Some birds don't build nests at all.



Harvestman - phalangium opilioDaddy Long Legs are Spiders
Daddy long legs are the subject of a few popular myths. The largest myth is that they are spiders. Yes yes, someone is bound to point out in the comments that there IS a spider called the Daddy Long Legs (a.k.a. the long legged cellar spider) but what most people call a daddy long legs are the Harvestmen that you commonly find crawling in the woods. They are in the same class as spider i.e. they are arachnids but so are scorpions and wood ticks. Spiders belong to the order Araneae and Harvestmen belong to the order Opiliones. Lest you think I'm being too pickey, consider this example. It would be like calling a mosquito a "cockroach". This is exactly the same situation. I mean, hey, they're both in the scientific class Insecta, close enough right? No, sorry, they simply are not spiders.

An interesting sub-variant of the myth I hear a lot from kids is that daddy long legs are the most venomous spider in the world but their bite can't break through human's skin. I think this appeals to kids because they can pick up daddy long legs and feel cool that that they are handling something full of such deadly venom. Sorry, this one is a myth too as long as we're talking about harvestmen. Harvestmen have no venom. The Cellar Spiders that are sometimes called Daddy Long Legs do have venom but no toxicity tests have ever been performed on mammals because there is no way they could ever bite someone. The hosts of the show MythBusters were able to get a cellar spider to bite them (which must have been a feat in and of itself) and they suffered no ill effects.

Earthworm divesEarthworms are Good for the Soil
I remember my mom teaching me this one. We were working in the garden and we'd find worms. She explained that worms till the soil and keep it healthy for the plants by aerating the soil. This is the common story we all know. This is also why for years people have tossed their extra worms into the woods when they finished fishing. They thought they were helping the woods. What we now know is that many worms are highly destructive in a woodland environment and dumping your bait in the woods can actually destroy the woods. The nightcrawlers sold as bait are invasive and eat soil leaf litter at an amazing rate. They are too effective at what they do. When earthworms burn through the limited organic duff layer present in our forests they prevent our woodland flowers and many other plants from growing. The woods where I work used to be filled with spring wildflowers when the nature center opened and now, forty years later the soil is practically bare each spring. The flowers simply cannot grow here anymore because worms have damaged the soil. Once established they can never be removed.


Great Horned OwlOwls Can Turn Their Heads 360 Degrees or More
Since I work with live owls I get this one often. It seems many people believe owls can turn their heads completely around. I'm not sure where this comes from exactly. Cartoons perhaps? Owls certainly can turn their heads further around than humans but not 360 degrees. Most owls have about 270° of motion in their necks.
The bulb-like shape of their large eyes cause them to be locked forward facing in their heads. Owls have to move their heads a lot to look around as they cannot move their eyes like we can.

Bufo americanus in NH 01Frogs Cause Warts
This one is easy. Yes, warts are in fact contagious. Warts in humans are caused by variants of the human papillomavirus or HPV which can be passed though contact. (Genital warts being the most infamous.) However, the bumps on a frog or toad's skin are not warts. They are simply bumps so, no, you can't get warts from touching a toad. It is probably a good idea to leave that frog or toad on the ground anyhow. Amphibians take in substances through their skin very easily. Sunscreen, hand cream, bug spray or even soap residue on your hands can be harmful to amphibians and make them ill if you pick them up.

Rubber DuckA Duck's Quack Does Not Echo
Who came up with this insane idea? I don't think this myth is as popular as it once was but it still comes around once in a while. Let me be clear. Any sound can echo. The myth probably stems from the fact that ducks quack quietly and often in wide open spaces that don't reflect sound waves well. Why ducks though and not Chickadees or a snake's hiss? The real mystery is how this silly rumor started in the first place.


BeaverBeavers Pack Mud with Their Tails and Live in Dams
There are lots of rumors about beavers but I've lumped these two together. Beavers use their tails to help swim and also as a signaling device. They slap it on the water as an audible signal. They do not use their tails to pack mud on dams and lodges. Speaking of dams and lodges. Beavers live in lodges, not dams. A dam is a solid structure built to create a pond deep enough to build a lodge. There is also no special kind of beaver called a "bank" beaver that build lodges on the banks of lakes instead of in the middle. Beavers are beavers, they sometimes choose to build along a bank and sometimes build in more open water.

Emperor Penguin Manchot empereurPenguins Tip Over when a Plane Flies Overhead
This bit of fiction seems to be newer in origin originating in the 1980s. It was popularized by the cartoon Bloom County. Lots of people seem to believe it simply because someone told them it was true. The idea is that if you fly low over a penguin colony, all of the birds will stand and watch in amazement and simply tip over as they crane their heads ever further backwards. The idea of penguins falling over in waves like bowling pins is humorous but purely fictional. In reality, penguins are afraid of planes and tend to run away in a panic rather than standing still and tipping over.


Lagurus lagurusLemmings Commit Suicide by Jumping Off Cliffs
Most people put the blame for this one squarely with Disney. While they did not create the myth they popularized the misconception in the 1958 Disney film White Wilderness. The film features actual footage of mass migrations of lemmings jumping to their deaths. At least, it seems to, but the entire film is a fake made in a studio and is based on earlier misconceptions of lemmings. Lemmings do sometimes drown in rivers (just like other animals) but they don't reach some critical mass and decide to commit suicide en mass by jumping off cliffs.

ColureSeasons are Caused by Our Changing Distance from the Sun
This is an innocent enough mistake to make. Many people assume that the difference between summer and winter is that the earth is closer to the sun in summer and further in winter. The distance to the sun does in fact change over the course of the year. However, keep in mind that when it is summer in the Northern Hemisphere it is winter down in the Southern hemisphere. If seasons are caused by distance then it would be the same season everywhere on Earth at once. Seasons are in fact caused by the fact that the earth is tilted with respect to the plane of travel though space. When it is summer, your half of the earth is tilted toward the sun and the sunlight is more direct. It also appears higher in the sky and is out for longer. More sun + more concentrated energy = warmer weather. The opposite is true in the winter. Distance from the sun doesn't really enter into the picture.

Those are my top 10 nature myths. Leave comments if you know of others you think I overlooked!

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