Wetland Nature Bingo is a game played primarily in the Eastlands, though different versions exist for different major swamps. The most prominent version of the game is the one meant to be played at the swamps of Festeron, which includes the Jade Mallard (but then again, nearly every version of the game has this bird). The Jade Mallard is such a common bird, being found in practically every swamp and marsh of the Eastlands, that it represents the "free" space in Wetland Nature Bingo.

Wetland Nature Bingo, founded sometime before or during the Great Monster Uprising, has inspired two additional spin-offs by the same company: Westlands Wetland Bingo and Antharian Wetland Bingo.

SOURCE(S): Legends of Zork (game, personal correspondence with author of "Enter the Face Breaker" quest)