I learned this a few years ago from a colleague in biology. He and his students routinely collect birds in nets for tagging and measurement, and he mentioned th

I learned this a few years ago from a colleague in biology. He and his students routinely collect birds in nets for tagging and measurement, and he mentioned that it's important for them to check the nets every few hours when they're set up. If they leave the birds trapped in ground-height nets too long, the local deer will find them and eat them. (This behavior was alluded to in the article.) I got the feeling that a lot of herbivores out there would happily be omnivores if they were able to catch appropriately-sized prey.