I was working behind my house yesterday and happened on a somewhat unusual sight. What I saw involved two insects, one was some sort of green larvae which we called caterpillars when we were kids, and the other looked a little like a wasp, but I think it's likely it was some dirt-dauber variety. Anyway the dirt dauber had straddled the caterpillar and was holding him up off the ground under his belly with some of his legs, while his other legs allowed him to easily walk around with the caterpillar. I think he was too heavy to fly with his load. It all sort of looked like an old WWII airplane with a torpedo strapped underneath.
On looking very close I could see that the dirt dauber had his mandibles biting into the caterpillar and that seemed to make the caterpillar stay still and very straight. In other words the captured caterpillar was not wiggling. Whenever the dirt dauber would lose his grip the caterpillar would wiggle as normal, and it was amazing how fast the dirt dauber could find and capture him again. Once found and re-bitten the caterpillar would become still and straight again.
The last I saw them the dirt dauber was carrying the caterpillar off into some deep grass.
What an obvious lesson from nature. Two insects, the caterpillar basically only had green camoflauge for defense, the dirt dauber was armed with mandibles and he totally dominated his heavier victim.