After all, we can study spider evolution too, and it’s a notably branchy tree, especially compared to those loser primates who are in decline.

That last number, 62 spiders in 10-30 species living in our homes, is probably a very conservative estimate. That’s close to what I’ve seen in my cold northern home, and I know I’ve grossly undercounted everything.

…is in my office, of course. They must know I won’t squish, and I might even throw them a spare fly.

[Read more…]

This week is a mess: I gave an exam, I need to get it all graded. I have two students doing senior seminars, with rehearsals tomorrow and the day after. We have two — count ’em, TWO — faculty meetings this week. And then there’s the usual course load.

So of course this is the day another Steatoda triangulosa egg sac has to start spewing spiderlings. It doesn’t look like much right now, that blurry dark blob is the egg sac itself, and I count a whole six newly emerged spiders, but more will be coming in the next day or two. Just these few are a handful, as soon as I popped the lid they were rushing to balloon off into the sunset. We have an experiment in mind for this batch, so we’ll be setting that up real soon.

Oh, right, this also meant that this morning I was frantically scrubbing the dishes I’ve been neglecting in the sink, because we’ll need a lot more containers.

It doesn’t look like much, but tomorrow that will be a seething box of baby spiders.

It’s unfortunate they’re so hard to hear, but did you know that spiders can make sounds?

Instead of catching flies in a web, the wolf spider hunts and runs down its prey, including small bugs and even other spiders. They have excellent night vision and because they make a hiss-like sound, they are among the so-called hissing spiders.

“Hissing is kind of a misnomer,” Dill said. “What they do is actually called strigulation, like crickets do when they rub their legs together.”

In the case of a wolf spider, it makes sound by rubbing its front legs together.

“Those front legs have hairs that are best compared with Velcro with little hooks on the end,” Dill said. “Some people say it sounds like a hiss when they hear it.”

The behavior is partly a defense strategy and, for the male spiders, mating behavior. In fact, they will turn up the volume during mating season by rubbing their legs while sitting in a pile of dry leaves, according to Dill.

“The rustling of the leaves helps them make more noise,” Dill said.

I don’t think my quiet little Theridiidae make any noise — they’re homebodies, they’re interested in vibrations but not at any detectable auditory level — but now I’m tempted to get some teeny tiny sensitive microphones to check them out.

Also…here is the required “creature of the night” video.

Well, today is another overloaded day, with a lab this morning, and then I volunteered to take a group of students on a spider tour of campus (we’ll walk around and do some observations), and then I have a division meeting this evening. But somewhere in there I’ve got to set up some Beefcake Fruit Flies for an experiment I describe on Patreon. Yeah, it turns out you can bulk up flies with dietary supplements. It’s true. I’m going to see if musclebound flies are better for spiders.

If it works, look for my profitable line of Spider Food Supplements on sale online.

I suppose I could ask if beefcake flies make beefcake spiders, and feeding beefcake spiders to birds makes beefcake birds, which could in turn be consumed by people…but that’s getting too renfield. It’s always a danger that one can be tempted to go down the renfield path.

I knew it all along. What I read in the popular press about spiders seems to be a lot of spook stories — it isn’t news unless it reaffirms peoples’ fears. I’ve wondered how bad the reporting is, and now it’s been quantified: a bit less than half are sensationalist. That’s slightly better than my impression, but still awful.

Overall, the quality of the reporting was poor: 47% of all articles contained one or more errors and 43% were sensationalist. Stories with photos of spiders or alleged bites were more likely to be sensationalized, as were stories that contained errors. Whereas quotes from medical or other experts were unrelated to sensationalism, stories that contained quotes from spider experts were much LESS likely to be sensationalized.

If it bleeds, it leads — or if it has fangs, too many legs and eyes, and is venomous, it justifies a freak-out on page 3. What to do about that?

We next conducted an analysis to describe the flow of spider news stories around the world and to get at what may be driving the spread of (mis)information about spiders online. Unsurprisingly, countries with shared languages and with higher proportions of internet users were more likely to be connected in the global network. The number of medically important spider species present (i.e., those capable of harming and potentially killing humans) also increased the connectedness of individual countries within the network. Most notably, we identified sensationalism as a key factor underlying the spread of (mis)information.

This study provides insight into what drives the global flow of information about spiders in particular, but can also teach us some more general lessons. Our results make us optimistic because they suggest a way to improve reporting on spiders, and in turn, to shift the quality and spread of online information more broadly. News stories are less sensationalized when they consult appropriate experts, and reducing sensationalism can help decrease spread of misinformation. We found that even local-scale events published by regional news outlets can quickly become broadcast internationally, which means improving news quality at the local scale can have positive effects that travel through the global network.

Journalists, you know you can pick up your phone and call your local university or extension service and contact someone knowledgeable about the species you’re planning to libel, right? It’s not hard, it makes your story better, and it doesn’t compromise your integrity. It would be less lurid and melodramatic, though.

Besides, everyone knows that spiders are really cute and playful.