Subject: bug sucking on a monarch caterpillar
Location: SE Wisconsin
August 3, 2015 5:34 pm
We have swamp milkweed in front of my parents’ house and the monarchs love it. For the first time ever, I found this bug sucking the insides out of one of the caterpillars. This was Aug. 3 at about 5 in the evening. I’m familiar with assassin bugs, but not ones like this. I didn’t kill it, but moved it to another part of the yard so it wouldn’t eat the other caterpillars too!
The predator is a Predatory Stink Bug, the Spined Soldier Bug in the genus Podisus, and it is an immature nymph. This is not the first time we have received an image of an immature Spined Soldier Bug eating a Monarch Caterpillar.