Gentle Ben

Gentle Ben was a family-adventure series from 1967-69 about a 650-pound black bear which has been adopted by the Wedloe family, specifically eight-year-old Mark (played by Clint Howard, Ron Howard's younger brother). Mark had helped to save the bear's life from a ruthless game hunter, and now the two were best friends.

Mark's father Tom (played by Dennis Weaver) was a game warden, and the show's stories took place within the Florida everglades.
From: Pulp-Cult.com

Gentle Ben opening