>>2291987As best as I can find, the two sightings in Maine on this map are "type 2 confirmations" from 1995 and 2000, specifically MDIFW went out to investigate a couple reported sightings and found tracks and hair samples. Those should be treated with general caution, but it's not unreasonable to think they were actually cougars.
https://www.cougarnet.org/sites/original/northeast.htmlBut generally, yes, they're extremely rare to the point of not being there at all. Officially extinct in the state for decades. Any cougars in the area more than likely would have traveled from the nearest "source" population, which is in South Dakota.