Wednesday, October 28, 2020

NCJ Archive: Bring on the Bugs

Posted By on Wed, Oct 28, 2020 at 10:23 AM

click to enlarge Female cross orb weaver showing distinctive cross pattern on her back. - PHOTO BY ANTHONY WESTKAMPER
  • Photo by Anthony Westkamper
  • Female cross orb weaver showing distinctive cross pattern on her back.
Editor's Note: It's that time of year again, the pumpkin spiders (aka cross orb weavers) are back. And while the world around us may seem a bit, well, scary right now, at least nature is staying the course by delivering up a cadre of crawling critters just in time for Halloween. So, here's a story on their annual arrival from the fall of 2007, a simpler time, perhaps, but isn't it also nice to know some things haven't changed.

There has been a lot of bug action at my house lately. On warm nights, the chorus of crickets from the front yard is loud enough to get a little embarrassing. If I go outside and walk up and down the street, it becomes obvious that the entire cricket scene is happening at my house alone. They have made themselves very, very comfortable in the tall grasses and asters in my front yard. That’s great, but their enthusiasm can be a bit much after a while. I keep waiting for the neighbors to step outside and tell them to keep it down.
The spiders have moved in as well. A cross spider hung inside my kitchen window for a month, growing bigger every day. Outside, more cross spiders — easily recognizable by their brown bodies and spotty white crosses on their backs — strung elaborate webs between the shrubs. Just now, as I was typing this, a spider dropped from the rafters onto my desk. Is this Halloween season or what?

Ladybugs waddle across my kitchen table in the morning. One night, a moth fluttered onto the book I was reading in bed. The next night, a spider showed up in the same place at the same time. “All right,” my husband said, jumping out of bed. “That’s enough. Do something about that spider!” “

Wouldn’t it be interesting,” I asked, as I swept the spider carefully onto the back of a magazine, “if a different bug came to visit us in bed every night at the same time?”

“No, that would not be interesting!” he said. “Where are you taking that spider?” I think he suspected that I’d set up a bug menagerie in some unused corner of the house, but I assured him that I was going to sweep my little visitor out the window.

I got to wondering why so many creepy bugs appear, as if on cue, around Halloween, so I called our resident bug expert Peter Haggard, who wrote Insects of the Pacific Northwest (Timber Press, 2006) with his wife Judy.
“It’s a good time of year for spiders,” he said. “Their life cycle is such that the females are ready to lay eggs right now. You might see a cup of sewed-together leaves off the web where she spends her time. In the cup you will find her husband. She’ll keep getting bigger and bigger until she lays her egg case, and then she’ll lose 80 percent of her body mass. In fact, that egg case will be larger than she is. And she’ll die within a couple of days.” There it is: the drama of a spider’s life. Big pregnant spider in the center of the web, little husband off to the side, and a litter of eggs that will have to fend for themselves.

The brown cross spider is a European introduction that does well around humans, but there’s a native spider that’s easy to spot right now too: Argiope aurentica, the big black and yellow spider that also lays its eggs in the fall. I asked Pete if people should be worried about getting bitten by these spiders.
click to enlarge An Argiope aurentica. - WIKIMEDIA COMMONS
  • Wikimedia Commons
  • An Argiope aurentica.
“You know,” he said, “all spiders make their living biting. Most of their toxins don’t do more harm than a mosquito. Spiders have no interest in biting you. I handle them all the time, and they’re just not that aggressive.” (Although I wasn’t worried about getting bitten by the spider that was living in my kitchen window, I did decide to move her outside, in the name of marital harmony, once I realized that she was getting ready to lay eggs.)

He had some surprising information about the crickets in my yard, too. “You know, there was no cricket noise around here years ago,” he said. “In the last decade or so, gardens have really gotten to be full of crickets. But they’re an introduced species sold in pet stores. You know, the black ones? They like to live under boards and around people’s homes.” Although they’re not native, they’re not much of a problem, he tells me. “We have native crickets too, but you won’t see them around humans much. It’s these introduced crickets that like to hang around and chirp at sunset. That’s all right — it’s a nice sound.”
click to enlarge A woolly bear. - WIKIMEDIA COMMONS
  • Wikimedia Commons
  • A woolly bear.

He also suggests keeping an eye out for banded woollybears, Pyrrharctia isabella, the fuzzy black and orange caterpillars that turn into orange moths. “They say you can tell what kind of winter we’re going to have by looking at how wide the orange band is around their bodies,” Pete said. “I don’t know about that, but they’re interesting to watch, anyway.”
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Amy Stewart

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