Here’s the proud papa of that egg sac.

By the way, he’s cohabiting with his partner with no conflicts at all. She hasn’t tried to eat him even once.

It was a long day in the lab — I had to catch up with washing glassware, a disgusting job since the main chore was all the fly bottles. There was a reward, however. I’ve been waiting for the colony to take off, and finally, they’re just pumping out spider eggs. We counted nine egg sacs at various stages of development today. Here’s one proud mama with her gigantic egg sac. Yes, all that came out of little ol’ her. She’s looking a bit deflated since this weekend.

In case you’re wondering what you’re looking at, we cut up cardboard boxes that contained mini-cans of pop, which turn out to be just the right size for our sterilyte containers. We cut out the center of the boxes, leaving just the edges and corners, which makes for a nice frame for them to spin cobwebs on. The big advantage is that we can pick up the whole cardboard frame, carrying along the spider and her web undisturbed, and rotate it around to find where she was hiding. In this case, she’s snugged up in one corner of the light cardboard box with an egg sac that is, I swear, twice her size.

If you compare this photo to yesterdays, you can see that yesterday the embryos were in the process of molting, with the prosoma free and the abdomen and legs still trapped in the old cuticle. Today the legs are free and the old cuticle is a shriveled white mass at the end of the abdomen.

We have lots of healthy looking babies from this clutch, which worries me…we’ve got three more egg cases that will probably hatch out this week, and we’re going to be swimming in baby spiders. I’m going to need a lot more flies, I think.

Here’s a closer look at its cute l’il baby face.

There was some concern about a clutch of embryos that I accidentally removed from the egg sac prematurely. I was worried that they wouldn’t develop properly. Well, concerns allayed. They’re busy making legs just fine.

One catch, though, that I discovered to my horror. There’s a reason for that protective silk egg sac: at this age they’re just a delicate membrane over a ball of fluids, and they rupture at the slightest touch. I’m going to have to leave them alone until they’re tough enough to walk about on their own.

I’m back! I have to say that, after drinking margaritas with Iris, the next best part was the spider tour, and in particular this one place, the Thompson Hill Information Center and Rest Area, which was magical.

I had a good feeling when I saw all the plants growing up right next to the building, and I was right. I went to the left behind the shrubbery and there in the corner, I saw this:

All those dark dots running down the center? Spiders. All Parasteatoda. I counted 9 in just this one little strip, and there were more and more all around the building, and then there were multiple picnic shelters that were home to many more. It was a spider bonanza!

Want to see a few? Look below the fold.

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I’ve been making a pest of myself on iNaturalist the past few months, throwing in photographs of spiders with my wild, poorly-informed guesses about their identity (I’m a total newb in this business, just an enthusiastic newb), and someone took pity on me and recommended another field guide I can use, specific to this region. It’s Spiders of the North Woods by Larry Weber, and I ordered it on the spot. Yay! I look forward to being slightly less annoying to the real arachnologists!

It won’t be here until Monday, though, and today we’re driving from Duluth back to Morris, and I’ll keep on poking my face into spider webs on the way.

Today was a glorious day for a road trip from Morris to Duluth. I told Mary that we should take it slow and easy.

“It’ll be a relaxing, low pressure trip,” I said.

“We’ll make frequent stops,” I said.

“We’ll stop now and then and go for walks to stretch our legs,” I said.

“It’ll be fun!” I said.

“We’ll look for spiders,” I quietly said.

And we did. The first half of the drive was a little disappointing, because it was unpleasantly hot, and spiders are wise and lay their trappy little webs and retire to the coolth under an overhang or in a small crack. We saw spider sign, but not much else. The one exception was this subtle little lady who was quietly lurking under a handrail with her babies at the Big Spunk rest area.

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Mary keeps finding spiders for me, and she brought me this lovely Parasteatoda this afternoon. She was remarkably active and was just skittering around in the vial, and she was so plump and pretty and vivacious that I had to give her a bigger cage of her own in the lab, and within seconds of being placed on the frame she was building a big new web — you can see a bit of it stretched between her toes.

I named her Shae. The colony is getting quite large now.

Yesterday, I showed you that clutch of spider eggs I’d accidentally removed from their silken egg sac. This morning I checked on them, looked into the incubator, and saw they were still resting there in a tight little ball, but when I picked up the vial, they disappeared. The coherent ball of eggs fell apart, and all the individuals went tumbling down, like little beige pearly ball bearings, and they’re rolling around on the floor of their container.

I don’t consider this a good sign — it means that they initially had some adhesive properties and that they’re drying out. Mama Spider puts a drop of mystery fluid in the egg sac as she’s laying eggs, and it’s not clear what that does for them. These eggs may be doomed. I spritzed some water vapor into the vial and also dampened the foam plug to get the humidity up, but we’ll see. I’ll be keeping an eye on them.

P.S. They’re not like chicken eggs, where a fall from 20 egg diameters up is going to crack them all. There are some privileges to being tiny.