She says she knows what she saw.
Poke says the big cat walked through her neighborhood in Lenox, Massachusetts.
Her report is one of hundreds or perhaps even thousands in the Berkshires over the past decade.
But the biologists insists the mountain lion disappeared from the region in the 1800s.
State officials tell the Berkshire Eagle most mountain lion sightings turn out to be cases of mistaken identity, everything from bobcats to dogs.