Sighted by a volunteer near the same spot the evening before; early the next morning by another volunteer when it was ~40°F; in the afternoon, a park visitor asked if I'd take a look at it & it barely moved when prodded, so I asked for Rangers to come out. Once we got Rosy in a sweatshirt and a ranger truck with the heat on, he/she perked right up. (It was taken to PW.)