Are the birds in the "Heckle and Jeckle" cartoons crows or magpies? Both words seem to be used?

Crows are all black.
Magpies are black and white.
Two different birds.

"Heckle and Jeckle are cartoon characters created by Paul Terry, and released by his own studio, Terrytoons for 20th Century Fox. The characters are a pair of identical magpies who calmly outwit their foes in the manner of Bugs Bunny, while maintaining a mischievous streak reminiscent of Woody Woodpecker."