Look at those circular holes cut out along the edges of the rose leaves. Unmistakable evidence that we have leafcutting bees nesting nearby in the backyard!
Megachile Latreille: Leafcutting bees construct their nests in hollow stems or holes in trees. The cells they create for their eggs are formed by neatly cut pieces of leaves ( see photo above) or petals.
Some years ago I actually observed a leafcutting bee at work, cutting neat circles out of the edges of the leaf of a wildflower. It worked systematically, and quite fast, until it flew away with several pieces to its nest.
I'd love to see one in action again. Hopefully soon...