Wayland Town Crier 12/4/11: Tree-stripping winter moths creep into MetroWest. They look innocent now, fluttering among the trees and street lamps. But come spring, the winter moths' green, squirming offspring will be devastating the region's tree populations. State and local experts are worriedly watching the invasive species as it spreads from the east into MetroWest, where the moth's ravenous larvae have already started to thin oaks, maples and cherry trees. Aerial surveillance this past year showed large swaths of bare trees in towns including Wayland, Sudbury and Framingham, said Ken Gooch, Forest Health Program director at the Massachusetts Department of Conservation and Recreation.