We've learned male otters travel more frequently and farther than females, and that males and females live in different locations. Females generally stick to a home area of two to 12 miles, though some travel farther. These older, territorial males gain access to resident females. A territorial male will mate with several females throughout the year, but a female usually mates with one male during the brief time she is fertile. The pair form a bond for three to four days, feeding, grooming and mating together.
Rafts typically consist of two or more resting otters.