The majority of crows mate for life. Although they reach sexual maturity at age two, many crows don't mate until later - they are waiting for the right partner. Unless their partner is killed, most crows stay with the same mate, year after year.
Manatees, Florida Propeller scars mark this manatee—graphic evidence of a too-close encounter with a boat. About one in four of Florida's 360 manatee deaths in 2012 resulted from collisions. Slow-speed zones help, but some boaters resent the restrictions.