What's That Bug? does not endorse extermination

Subject: Tarantula Hawk Long Beach
Location: Long Beach CA
April 20, 2016 2:49 pm
Hi, I first saw one of these beauties scouring my yard in the early mornings and late afternoons 3 years ago. I could not find anyone who’d seen one here and my tentative identification of Tarantula Hawk seemed insane. But they keep showing up the 2nd-3rd week of April every year and my neighbors are seeing them now too.
I notice you said you’d never seen one in Mt. Washington and assumed this was because their prey had diminished. That’s my REAL question. Since they are successfully reproducing, I wonder what kind of spiders are also making a comeback? Is my yard home to tarantulas? Trapdoors?
I’m about 10 blocks from the ocean and quite a ways between both rivers. I think tarantula were native here before urbanization and, well, every year now is the hottest year on record…
Incidentally, I think their behavior (the females) is noteworthy for identification purposes. They are OBSESSED. They fly very low over grass, or run around cracks in concrete, over and over and over for a couple of hours every day and return to the same place the same time the next day. They take off in a hurry at my approach but immediately return to their task. I suspect they divvy up territory and I’m seeing the same wasp return to the same place? (There’s a different spot in my front yard that attracts another). I THINK the occasional stray that cruises in, flies higher, lights on a branch or just plain doesn’t appear to have OCD disorder is the male hoping to get lucky? I’ve spent lots of time observing them, but I’ve yet to figure out where they go when they’re not hunting (do they live in the ground too?) or see one catch a spider.
Signature: Curious

Spider Wasp

Spider Wasp

Dear Curious,
To the best of our knowledge, only two genera from the Spider Wasp Tribe Pepsini are officially Tarantula Hawks.  We believe your have a member of the tribe, possibly
Calopompilus pyrrhomelas based on this BugGuide image and others posted to the site.  The brown tips on the wings is similar to your individual.  According to BugGuide, the prey for the species is this Trapdoor Spider.  Despite the similarity in coloration, we believe your individual is a Spider Wasp, but not the more specific Tarantula Hawk.  Arachnoboards has an interesting discussion regarding Tarantula Hawks in Long Beach.

Thank you so much. They may “belong” here, but no one I know has ever seen one and suddenly they’re enjoying a population boom. Don’t know if its a comeback, or they arrived on native plants, or they abandoned a habitat that’s gotten too hot. But we apparently have the spiders they need!
I’m normally paranoid of wasps due to allergies, but these aren’t even slightly aggressive. I’ve gotten to watch them so closely because they fly in easy range of my fascinated cats, so I supervise the cats’ outdoor time in order to stop them from pouncing on the wasps.
I’m attaching a better photo, and if I ever catch sight of the the trapdoors, will try to pass along a photo of them.
Your service is fantastic!

Spider Wasp

Spider Wasp

What's That Bug? does not endorse extermination
Location: Long Beach, California

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