Whats eating these leaves? in Wildlife in the Garden Posted April 24, 2020 · Report reply The pattern of damage is definitely not rabbit and almost certainly not bird: damage areas too tiny for rabbit chewing, not ragged/torn enough for collateral damage birds cause when stabbing to reach insects. It looks much more like a caterpillar, something that sat ON the leaf and moved its head back and forth in an arc eating leaf tissue edge-inward. Not a slug, they eat within the blade, not edge-in. Not a beetle, they scrape. Maybe a weevil but there are bigger areas of leaf involved than usual and this is not within usual weevil-season. Not a bug or aphid, they pierce, suck and deform or scar where they fed.Maybe a sawfly but like weevil issue, scope of each eaten area is bigger than is usual for sawflies, plus sawflies generally eat an entire leaf before moving to another. So I would look for caterpillars hiding nearby. You do that and I will go check our moth and caterpillar host plants lists to see if I can find any leads there.