Lizards need special care to stay alive. They need shade and heat and water and the proper food. You should try to get it to a shelter asap or else it might die, because they "look healthy" until they are within an hour of death (It's an instinctual survival trait..don't look sick, or you'll get culled). If you can't get it to a shelter, I might know someone who rescues lizards.
I just called my rescue friend, who contacted the OP. Rescue friend can't post, so I'm sending a followup. It's a bearded dragon, fairly valuable critter, likely abandoned "back to nature" by a dumb college grad / dropout who didn't have the sense to know these lizards can't survive a New England autumn, let alone winter. A reptile rescue group is in the process of being contacted.
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