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Calosoma scrutator grub - Calosoma

Calosoma scrutator grub - Calosoma
Barney Farm, Hwy 103, 1 mi. NW Washington, St. Landry Parish, Louisiana, USA
April 22, 2006
These grubs were alive and kicking when I took these photos. They would run around on the white board for a while, then stay completely still. They started showing up at the same time we started seeing tons of caterpillars.

Moved from Fiery Searcher. There are many species of Calosoma, and I don't think the larvae can be placed to species from photographs.

Hi Brad, a few of these were
Hi Brad, a few of these were reared to adulthood or I wouldn't have speculated on species.

Caterpillar eaters
I know that C. scrutator and several other large carabids eat caterpillars, so I thought I'd try presenting one to Nemo, my captive Ca*rabus Ne*moralis (asterisks hide these words from site's search function.) He checked it out and turned away from it twice. "Well, maybe he's not hungry," I thought, but I had also thought of a way to find out if that were so. When I collected the caterpillar, I also collected an earthworm, which I then presented to Nemo. Within seconds he had bitten the worm. My findings are purely anecdotal of course. A test using 50 beetles and hundreds of caterpillar-eating opportunities might have some scientific validity.

Date problem
Hi Steven - nice pictures! However, I notice several of your shots posted today have a date of December 31 1969 - that seems to be the default when the date is entered in a different format from that suggested on the form. Can you correct them?

How about posting some of those "tons of caterpillars", too - we need more caterpillars! :)

Man oh man!
I haven't even seen the adult yet! I wonder if C. scrutator is prevalent where I live in New Hampshire.

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