What's a brushfoot?

I got a better pic of the Weidemeyers Admiral on Wed. than I had shared in an earlier post where one had landed on my car. I like the shots on greenery vs on the ground.

I believe this is a (gorgone?) checkerspot, a brush-footed butterfly of the sub-family of true brushfoots. I didn't even know such a species/sub-species existed until a few days ago! So much to learn, so little time...I took this pic on my outing in the N Hills Wed.

This is what it looks like where I took the butterfly photos on Wed., while looking for bird photo ops.

Spreading dogbane (dogbane family) grows abundantly about the Black Hills, and has just begun blooming. I took this photo along the off-road trail a zip and a zing from my 'hood, where the hubs and I like to go 4-wheeling. This trip Thurs. was cut short by a looming, ominous thunderhead...we shot outta there like a fired canonball...kind of fun actually. We made it home well ahead of the storm.