Yes, I do know why spiders curl up when they die

We’ve had several frosty mornings and even a brief snow flurry, so spiders have been dying off all over the place. I watched this video because I thought it would be more morbid, but it’s actually pretty cheery, with lots of short clips of beautiful spiders. It’s also very basic, but hey, I need to see more spiders!

One quibble: the narrator disses grass spider webs, saying they’re “not fancy”. I sense a bias favoring orb webs! Grass spiders build these slick platforms for prey to land on, with the sheet funneling back to an elegant cozy tunnel where they lurk. They’re very nice.

I could also make a case for cobwebs, which look chaotic but are actually 3-dimensional structures, unlike those planar 2-D orb webs.

Every spider is as brilliant as it needs to be!

Uh-oh, curmudgeon alert. Everyone has been sending me this article, “Spiders are much smarter than you think”. It’s a good article. It’s just that a few things about it set me on edge.

Smarter than I think? You don’t know what I think. I already have a high opinion of spider intelligence. But OK, they’re doing good work to spread the news about the abilities of spiders. You should read it if you don’t already know about it.

I’m also bothered by the word “smarter”. We can’t quantify intelligence! Not in people, not in spiders, not in anything. We can isolate bits and pieces of aspects of intelligence, and measure some of it, but “intelligence” in the broad sense is multifactorial and hard to pin down. What the article actually describes is behavioral adaptability and the capacity to model their environment. Spiders can do that! By studying them, we can discover interesting things about how they do that.

Another concern is that the article is almost entirely about a single species, Portia.

No fair! Jumping spiders are a kind of charismatic microfauna, cute and pretty. They are active predators, too, which tends to bias our impressions of their human-like behaviors. We are self-selecting for what we quantify as “smart”, which is often a word meaning “human-like”. A lot of spiders, though, are ambush predators who have a different suite of behaviors. Are they less smart? A black widow that left its web to chase prey on foot would be less “smart”, but we might judge it as more in alignment with our expectations.

I do very much agree with these sentiments, though.

“There is this general idea that probably spiders are too small, that you need some kind of a critical mass of brain tissue to be able to perform complex behaviors,” says arachnologist and evolutionary biologist Dimitar Dimitrov of the University Museum of Bergen in Norway. “But I think spiders are one case where this general idea is challenged. Some small things are actually capable of doing very complex stuff.”

Behaviors that can be described as “cognitive,” as opposed to automatic responses, could be fairly common among spiders, says Dimitrov, coauthor of a study on spider diversity published in the 2021 Annual Review of Entomology. From orb weavers that adjust the way they build their webs based on the type of prey they are catching to ghost spiders that can learn to associate a reward with the smell of vanilla, there’s more going on in spider brains than they commonly get credit for.

“It’s not so much the size of the brain that matters, but what the animal can do with what it’s got,” says arachnologist Fiona Cross of the University of Canterbury in Christchurch, New Zealand.

Yes! So let’s avoid judging animals whether they are smarter or dumber.

It turns out that many hands do make light work

Today was spider feeding day, and it’s usually a bit of a chore just because I have so many spiderlings right now. Mary came along to help this time, though, and it was amazing how easy it was: I’d zip along all the vials with spiders, flicking sacrificial flies to their waiting doom, and she’d follow along behind, capping each vial as I went. Zoom, it was done.

Now my dilemma: do I keep my wife, dragging her in to assist every feeding session, or do I grow an extra pair of hands? The latter does have some attractive aspects, you know.

Some of you are gonna hate me for this image

But it’s almost Hallowe’en, so I get to revel in spiders for a while.

Below the fold is a photo of what looks like a gigantic spider filling a room, surrounded by a swarm of its babies.

The good news for you arachnophobes is that it’s a trick of perspective — it’s actually photographed in a smaller enclosed space.

The bad news is that the space was under the photographer’s bed.

The badder news is that it is a Brazilian wandering spider, one of the most venomous spiders known.

Also, the photo was posted on The Weather Channel’s page. You never know what you might see when you go to check the weather for a picnic.

Sweet dreams!

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Who will exterminate the exterminators?

No, no, no, this cartoon is wildly inappropriate, unless tomorrow’s follow-up is a bloody scene of vengeance as Lio turns his giant spider (with three body segments? Come on, Mr Tatulli) loose upon the exterminators.

It’s something of a peeve of mine when exterminators try to advertise in something like #spidertwitter, for instance, especially when they frequently categorize spiders as pests. I don’t even like to see insecticides sprayed on other arthropod targets — leave the bugs alone, they have a right to live, too.

‘Twas the night before Hallowe’en, and the spiders were scuttling about…

At 9pm Central on Saturday, 30 October, I’m going to start up a livestream on YouTube to just talk about spiders, and spider movies, and whatever scary things I can think of about spiders. It’s Hallowe’en! I get to indulge.

If anyone else wants to jump in the stream, just send me a note and maybe I’ll let you on. Or even commenters on that evening — if I trust you to tell us all cool creepy stuff, I’ll send you a link then.

Maybe I’ll try to convince Mrs Spiders to make a brief appearance, since she has to live with the abominable Dr Spiders and probably has the scariest stories of them all.

No tuffet, no curds and whey required

My wife was just sitting there, quietly reading, when she noticed this little friend descending from the ceiling to sit down beside her, and instead of being frightened away, she yelled for me to come see it. I was mildly surprised — it’s a male Steatoda triangulosa, which have been rather scarce this past summer (it’s generally been a poor summer for all spiders this year).

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