Crab Spider Tent

A crab spider and silk webbing at our family last weekend.

A few of us took a short trip out to our family prairie last weekend.  My daughter was back from college for the weekend and wanted to see what was happening in the prairie, so we did a little canoeing (tight circles in the small pond), hiking, and exploring.  Later, I found myself photographing dotted gayfeather seeds, and while I was looking for more of those plants, I stumbled upon a grass leaf that was bent funny with some kind of white silk holding it in that position.  I had actually walked past the grass leaf before my brain finally registered the fact that I should go back and examine it.

Looking more closely, I could see enough of the creature inside to identify it as a crab spider.  It had been raining quite a bit during the previous couple weeks, so my first thought was that the crab spider had made itself a little rain shelter.  (Crab spiders don’t make webs, but like all spiders, do make silk and use it for various purposes.).  However, my better guess was that it was a nest and that it might contain a bunch of spider eggs.  I photographed it for a few minutes, taking lots of photos, since the breeze was making it hard to keep the spider in focus.

A tiny spiderling, accidentally photographed.

Later, when I was looking through images at home, I was culling all the photos of the spider that weren’t in focus (dang that wind) when I happened to spot something that confirmed my guess.  Right above an unfocused crab spider face, a tiny spiderling appeared – just in one photo, not in any others.  Apparently, this was indeed a crab spider nest, and at least one egg had already hatched.  

The crab spider eventually shifted around and showed its face.

Crab spiders aren’t the only group of spiders that take care of their kids.  Frequent readers of this blog will, of course, remember a previous post of mine showing a mother wolf spider carrying her brood around on her body, and even if you don’t, you may have heard that wolf spiders lug both their egg sacs and newly hatched babies around with them.  Wolf spiders aren’t alone, though, and we’re still learning more about how well various spider species care for their young.  If you’re interested, you can read more in this nice blog post from Biome Ecology.  Otherwise, you can just join me in wishing this particular crab spider’s brood good luck as they disperse and try to find safe places to overwinter.

Olivia and the Whistle-Pig

This post was written and illustrated by Olivia Schouten, one of our Hubbard Fellows.  Olivia is an excellent scientist and land manager, as well as a great writer.  In this post, she shares a recent experience with, and some interesting trivia about, a cute furry animal.

We had a visitor in the front yard the other day, which gave me a great opportunity to take some pictures of a mammal I don’t often get to see. This woodchuck (Marmota monax) has been spotted around our crew quarters here on the Platte River Prairies for a few weeks now, and appears to have taken up residence in our wood pile. I finally managed to spend some time watching it from the safety of the living room while it foraged in the yard for dandelion leaves.

I was so excited to see this woodchuck come so close, so I could see the details, from its little ears to the frosted tips of its fur. But while they may look cuddly, woodchucks are known for being pretty feisty and aggressive.

I haven’t had many experiences with woodchucks, also called groundhogs and whistle-pigs. (As an aside, I didn’t realize they were one in the same until I was in college. I have a friend Jessica, who’s probably reading this, who was there when I made the connection and exclaimed “Wait? You’re saying how much wood would a woodchuck chuck and Groundhog Day are the same thing?!”, and likes to bring it up whenever she can.) In fact, I’ve probably seen more yellow-bellied marmots (Marmota flaviventris), a close cousin to woodchucks, while travelling in the Rocky Mountains than our local woodchucks. I remember hearing a few whistling while walking in the woods around my hometown in Iowa, but other than that, this may be the first one I’ve ever seen, especially this close!

One of the yellow- bellied marmots I saw and photographed while in Colorado in August. They look superficially similar to woodchucks, but their ranges don’t overlap, so there’s little risk of mistaking one for the other.

Unfortunately, the other experience I have with these mammals, and one that I’m sure many readers also share, is of their digging habits. My parents recently had one removed from their backyard because it was busy burrowing under their garage. Apparently they are also pests in gardens, which doesn’t surprise me since I watched the one in our yard munching happily away on dandelions for several minutes. I’m inclined to find ways to cohabitate peacefully with native animals that sometimes cause problems or destruction to human structures, and a quick Google search turned up a lot of advice on how to discourage woodchucks from taking up residence around your home or eating your gardens. But I’m not going to talk any more about that (though like many perceived “pest” species, the destruction they cause is likely inflated), because I think this woodchuck is adorable, and I was inspired to look up more information about them!

So here’s an informal list of some fun facts I dug up:

  1. The name does not actually refer to woodchucks chucking wood, but comes from a Native American word, wuchak, which means “digger”
  2. Baby woodchucks are called chucklings!
  3. They are really big squirrels! (Family Sciuridae)
  4. Their incisors grow 1/16” per week
  5. They can climb trees and swim
  6. They enter true hibernate over winter, surviving on stored fat instead of making food caches
  7. Their dens often provide homes for other animals like small rodents, reptiles, skunks, red foxes, and cottontails
  8. Woodchuck burrows have “bathroom” chambers
  9. The origins of Groundhog Day began in 1886, when an editor of the Punxsutawney Spirit newspaper wrote that the local groundhogs hadn’t seen their shadows, and therefore spring would be early
  10. Their bodies drop to 37 degrees during hibernation!
  11. And their heartbeats slow to 5 beats per minute!
  12. They have a top speed of 8 mph
  13. They are for the most part solitary, with males only hanging out with females during the breeding season and females taking care of their young
  14. They can eat a pound of food per sitting (a lot for a creature that weighs at most 15 lbs)
I love the black paws and legs of this woodchuck. It looks like she’s wearing gloves!
I could have watched this adorable creature waddling around the yard eating dandelions all day.