These are the arms claimed by the city of Sudbury. A red-white-and-blue shield (the colours of the Union Jack), with agriculture represented in chief, the lumber industry in fess, and mining (appropriately) underneath. Branches of pine and maple pretend to be supporters, and a moose stands above as a crest (I'm not sure if that green bit is meant to be a traditional torse, or if it is a piece of grass for the moose to stand on). Not much to explain.