Photo of the Week – May 19, 2011

A ground beetle showing off its massive mandibles. Aurora, Nebraska

I found this ground beetle in my yard when I was pulling up some bricks.  It’s a very common, though not often seen, beetle around here – and its close relatives are abundant throughout much of the United States.  This one appears to be Scarites vicinus, though it’s difficult to be sure.

This Carabid beetle spends its days beneath the ground, burrowing in moist soil or beneath logs (or bricks!).  It comes out at night to hunt on the surface, killing and eating just about any small invertebrate it encounters. 

If it is spotted by a mouse or other potential predator, the beetle’s first defense is often to “play dead” (see below) but if that doesn’t work, a pinch from its impressive mandibles can be a good fallback option!

When threatened, the beetle pulls in its vulnerable legs and antennae and stiffens up, looking for all the world like a dead beetle.

Many thanks to Ted MacRae for his help with identification and supplemental information on this beetle.  Visit his blog at: http://beetlesinthebush.wordpress.com/

Advertisements

About Chris Helzer

Chris Helzer is the Director of Science for The Nature Conservancy in Nebraska. His main role is to evaluate and capture lessons from the Conservancy’s land management and restoration work and then share those lessons with other landowners – both private and public. In addition, Chris works to raise awareness about the importance of prairies and their conservation through his writing, photography, and presentations to various groups. Chris is also the author of "The Ecology and Management of Prairies in the Central United States", published by the University of Iowa Press. He lives in Aurora, Nebraska with his wife Kim and their children.
This entry was posted in General, Prairie Insects, Prairie Natural History, Prairie Photography and tagged , , , , , , . Bookmark the permalink.

3 Responses to Photo of the Week – May 19, 2011

  1. Anna says:

    Those mandibles look painful! How big is that beetle?

  2. James C. Trager says:

    Rumor has it these guys use those mandibles to dispatch cutworms and the like. Looks like pretty good equipment for that (with the biting of fingers only an incidental use). When I was a kid, I had a pet skunk that just loved to pounce on these and eat them – hold down the head and crunch into them from the rear. I always wondered how it could stand the nasty, staining, defensive chemicals secreted from the abdomen???

PLEASE COMMENT ON THIS POST!

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