Thumper

Thumper is a rabbit who serves as one of the deuteragonists of Disney's 1942 film Bambi and its midquel. He is known and named for his habit of thumping his left hind foot.

The character was an important influence upon the development of the movie Bambi which started production with an adult tone which seemed too serious and noncommercial. As voiced by the young actor, 4-year-old Peter Behn, the vivacious character of Thumper was expanded from its original minor role and led to a focus upon the young animals in the story. He is also voiced by both Tim Davis as an adolescent child and Brendon Baerg as a child in the midquel and Sam Edwards as an adult in the first film.

Personality
Unlike Bambi, Thumper can be rather mischievous but ultimately means well. He often gives his close friends advice on a handful of topics but they usual get them into trouble. As an adult he hasn't changed much and continues to speak rather loud and thumps his left foot.

Bambi
The character Thumper first appears in the film Bambi, watching as Bambi is first presented as the young prince to the creatures of the forest. He remarks that Bambi is "kinda wobbly" but is reproved by his mother who makes him repeat what his father had impressed upon him that morning, "If you can't say something nice, don't say nothing at all". This moral is now known by such names as the "Thumperian principle", "Thumper's rule" or "Thumper's law".

Thumper appears as an adult, and is with Bambi and Flower when Friend Owl warns them of the dangers of being "twitter-patted". The three walk off with the intention to not let it happen to them, but Thumper soon falls for a female rabbit named Bixbi. The end of the film shows that he and Bixbi have a litter of baby rabbits.

Bambi II
In Bambi II, Thumper again appears hiding from his sisters and trying to help Bambi learn to be brave in the hopes of impressing his father Thumper is the main protagonist in a video storybook, Thumper Goes Exploring, which was released with the Platinum Edition of Bambi on March 1, 2005.

House of Mouse
Thumper makes numerous cameo appearances in the animated series House of Mouse.

Disney Parks
Thumper appears at the Walt Disney Parks and Resorts as a meetable character. He is usually found at Disney's Animal Kingdom meeting guest alongside or without his wife. Thumper also appears in the bubble montage in Fantasmic!

Thumper and Bambi can be found in the Hong Kong Disneyland version of It's a Small World. During the EPCOT Flower and Garden Festival, Thumper has his own topiary located in Future World.

Trivia

 * Thumper is similar to Timon in The Lion King than both are smarter than their two pals, and get lot of ideas. Also in Bambi II, both (in The Lion King 1½) were promise themselves never going to cry, but both cried at final scene.
 * According to a line spoken by Roger Rabbit in Who Framed Roger Rabbit, Thumper is Roger's uncle.
 * Thumper is one of John Lasseter's favorite Disney characters, to the point that Lasseter named one of the grasshoppers in A Bug's Life after him.