I was looking at my cherry tree, just planted this Spring, so I'm a neophyte cherry person; and saw that the leaves had damage from some little creature that I can't identify. It's about a half-inch long or less, with a slight bulge at one end that I assume is a head. The skin is shiny. It looks a bit like a slug that went through a shrink-o-matic, except for the head bulge and that it has no eyestalks.

I plan to do some handpicking tomorrow (the advantage of dwarf trees!), but am curious about what it is.