Spider hunter

Spider wasp

Spider wasp

This lovely lady has a territory right off my back porch. I’ve been watching her on and off for a couple of months now. She is a solitary female wasp in the family Pompilidae. This group is characterized by long, spiny legs, which you can see well in the picture below. There are over 5,000 identified species around the world!

Spider wasp digging a hole

Spider wasp digging a hole

The soft dirt right off the patio is perfect for her because she repeatedly digs holes. Once a hole is dug, she goes hunting in the yard (I’ve seen her up in the garden), attacks a spider, immobilizes it, and then takes it back to the hole in the ground she dug earlier.

After the spider is shoved into the hole, she lays an egg on it. In order to keep the egg and spider safe, she covers the hole with dirt, rocks, sticks, really whatever is around. In the top picture she is moving a rock to cover up a hole.

When the egg hatches, it will use the spider as food to complete its juvenile stage. The wasp larva will then spin a cocoon and later emerge as an adult, which will dig its way out. I’ve been kind of waiting for some to start coming out of the ground where she is always digging holes, but it would be pretty lucky to actually be looking at the ground when one emerged!

Although they attack spiders to provision their young, they themselves eat nectar, highlighting again that it’s important to have a variety of flowers if you want to see a variety of insects.

Tarantula wasp

Tarantula wasp

The spider wasp living in my yard is medium sized, about 3cm long. Some species, however, can get huge and even attack tarantulas. This video from National Geographic captures it pretty well. In the US, these wasps are common in Arizona, New Mexico, and Southern California. To the left is a picture of one from Tucson last year, feeding on nectar. They can be almost as big as your hand. And these ladies have plenty of bark to go with the bite! The are ranked very high up on the Schmidt sting pain index. So don’t try to catch them! But I would recommend following them around for a while because seeing one take down a tarantula would be awesome.


About keviclaire

I recently graduated from the Department of Environmental Science, Policy and Management at UC Berkeley. My research interests are focused on biological control and how to increase it's use in agriculture and home gardens. I am also an avid gardener and insect photographer. I'm using this blog as a place to share those interests!

Trackbacks / Pingbacks

  1. For the love of spiders | Get Buggy - February 8, 2016

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: