The Wild Thornberrys (1998)

S1E20 Born to Be Wild

Eliza secretly leaves home before her parents wake, determined to locate a rare Sumatran rhino. However, she soon realizes that revealing the creature's existence could threaten its survival. Faced with the dilemma of protecting the rhino, she decides to prevent her parents from capturing footage of it. Unfortunately, Nigel is already hot on the rhino's trail, complicating her mission.