Here are the spurs in question--actually cercae. They look like a bull's horns, turned inward.
Lots of bug ID is done at the naughty end. Wil is forever talking about how one bug's genitalia differ from another's. OK. I'm down with that.
Wil is in back, Lang in front as they flood the bug with light and film him singing his dry prolonged shirring rattle.
We all must spend time at our laptops, and Chet Baker makes sure that time is extra enjoyable.