Disney & The Mellomen (1968)

Heffalumps and Woozles are the overall main antagonists of Disney’s Winnie the Pooh franchise. They are creatures who first appeared in the 1968 featurette Winnie the Pooh and the Blustery Day.
Pooh encounters them in his dream during the song Heffalumps and Woozles. According to Tigger, Heffalumps and Woozles love honey and always want it, to the point of being willing to steal it. In fact, they turn out to be Tigger slang for Elephants and Weasels. Heffalumps look cute and cuddly like elephants, while Woozles look sly and cunning like weasels. A few of them turn out to be friendly in later installments.
The song was performed by The Mellomen.
The Mellomen were a popular singing quartet active from the late 1940s through the mid-1970s. They were founded by Thurl Ravenscroft and Max Smith in 1948. They recorded under a variety of names, including Big John and the Buzzards, The Crackerjacks, The Lee Brothers, and The Ravenscroft Quartet. They were sometimes credited as The Mellowmen, The Mello Men, or The Mellow Men. They sang backup to some of the best-known artists of the day, including Rosemary Clooney, Bing Crosby, Doris Day, Arlo Guthrie, Frankie Laine, Peggy Lee, Elvis Presley, and Jo Stafford.