Viceroy Limenitis archippus

Thought to be a Monarch mimic and certainly it is for butterfly watchers. For birds, maybe, not so much. Apparently these taste bad as well. Found near watercourses with Willow trees, you can tell them from Monarchs by the weaker flight and by that line across the hindwing. Darker in Florida. This is our local version. Sometimes very skittish.

The lateral showing the windows of orange up front and the hindwing line again.