Even not seeing the tail area, I would say that's a female. Thick robust body, broad head. If there's anything you want to know about keeping/breeding WC Oregon concinnus' just ask me. Been keeping them since 1977 or so. You can tell your friend that the reason they hang out in or near the water is because that's where their food is. Primarily amphibians and their larvae, and small fish. They spend a few hours a day out there hunting but they aren't water snakes. They should be kept on dry substrate, moderate humidity, and a large water basin for drinking and occasional bathing. They like a warm basking area 85-88 degrees, with the rest of enclosure in the 70's. 65-75 at night is fine.