Wow, the lethality of these swallow-worts to the cats: All of the monarch larvae died when hatching on black swallow-wort. “They stopped eating after a single bite,”

The really sad thing is, this is way up north, and that's the population that migrates back to Mexico. There are no swallowworts growing in my area, but if there were, I'd be out there trying to wipe out as many of them as is humanly possible.

Go, Jay!