Heckle and Jeckle

Heckle and Jeckle
Terrytoons characters
First appearance	The Talking Magpies (Terrytoons, 1946)
Last appearance	Birds of Paradise (Filmation, 1981)
Created by	Paul Terry
Voiced by	Dayton Allen Sid Raymond Roy Halee Ned Sparks Frank Welker Harry Shearer (The Simpsons cameo) Shinsuke Minami Isamu Nagato (CR TerryToons) Toby Huss & Bobcat Goldthwait (Crubside)
Species	Magpie
Gender	Male

Heckle and Jeckle are postwar animated cartoon characters 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 yellow-billed 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, Terry considered the Heckle and Jeckle series his studio's best cartoons.

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, slangy vernacular and gruff New York City dialect with traces of Jimmy Durante. 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.

...
Wikipedia