Marvin the Martian has sent them after Bugs Bunny, but they were all outsmarted by him. Prior to this short, aliens that looked very similar to them were encountered by Porky Pig and Sylvester the Cat during a desert camping trip, which were on a mission to collect earthlings for experimentation. Younger members of them were also encountered by Duck Dodgers around the year 2350. One of them would also be caught sleeping on the job of guarding a ship and failing to notice as Bugs and Daffy hijacked it.