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Official Site: CBS Television Studios

Heckle and Jeckle are postwar animated cartoon character created by Paul Terry, originally produced at his own Terrytoons animation studio and released through 20th Century Fox. The characters are a pair of identical anthropomorphic magpies who calmly outwit their foes in the manner of Bugs Bunny, while maintaining an aggressively mischievous streak reminiscent of the early Woody Woodpecker or Screwy Squirrel. Unlike Bugs Bunny, who retaliates against a foe only after repeated provocation, their comic aggression is often unprovoked, and in a number of Heckle and Jeckle cartoons (Moose on the Loose, Free Enterprise, The Power of Thought, Hula Hula Land) their foes win in the end.

According to Leonard Maltin's Of Mice and Magic: A History of American Animated Cartoons (1980) and Don Markstein's Toonopedia, Paul Terry considered the Heckle and Jeckle series the best cartoons his studio ever made.

Although identical in appearance, they are differentiated by their voices. Jeckle speaks with a slightly falsetto English accent, and his dialogue is somewhat more refined. Heckle is more rough around the edges, and speaks with a more informal, slang vernacular and gruff New York dialect. However, the two magpies are far more alike in temperament than they are different. The characters seldom referred to each other by name, leading to some confusion as to which one was which. Heckle usually refers to Jeckle familiarly, as "chum" or "pal", while Jeckle often calls Heckle "old chap", "old thing", "old boy" or "old featherhead", indicating a close friendship between them.

Among the few instances where the two are positively identified, they clearly refer to each other by name in the short Bulldozing the Bull (1951), with the Brooklyn accent belonging to Heckle and the English accent belonging to Jeckle. In the later cartoon Stunt Men (1960), Jeckle, in an English accent, again calls Heckle by name. In Rival Romeos (1951), the magpies, after being simultaneously smitten by the same female, race home to get dressed. They are shown to occupy two sides of the same tree, and each character's home is marked with a sign—Heckle is clearly designated as the Brooklyn magpie with his jaunty porkpie hat, and Jeckle dons an English-looking bowtie, monocle and straw boater. Rival Romeos is also one of the only cartoons where the magpies are at odds with each other rather than united against a common adversary (usually either of two series "regulars": Dimwit, a moronic hound dog, or Chesty, a belligerent, disagreeable bulldog).

Heckle and Jeckle has not been a contender in any CBUB matches.