In the 1986 film by Lucasfilm Ltd. (back before it was acquired by Disney), Howard the Duck was accidentally teleported from his dimension to the Human dimension during an experiment regarding dimensional transportation. While trapped in the human dimension, he befriends a female by the name of Beverly Switzler after saving her from a group of thugs. Eventually, he returns to the dimension, but sacrifices his return to his homeworld in order to stop the Dark Overlord, leaving him a permanent resident on Earth.
This film was technically the first entry in the Howard the Duck franchise to have him wearing pants. He would later end up wearing them in the comics as part of a settlement regarding a lawsuit against Marvel for copyright infringement due to his similarities to Donald Duck.
Howard the Duck appears as a living exhibit in the Collector's museum. In the post-credits, Howard makes a cameo in The Collector's museum remarking upon the destruction of the museum to the Collector.
Howard is among the heroes captured by the Collector, who admires the "ultra rare hero", stating he's in mint condition.
Howard the Duck's appearance and some of his outfit almost resembles that of Donald Duck. Because of this reason, Howard often wears pants to distinguish himself.
Ironically, Howard was originally a point of argument between Marvel and Disney before Disney had purchased Marvel. Due to Howard's resemblance to Donald, Disney had almost sued Marvel for copyright infringement until Howard was given a redesign to ease the dispute (hence his wearing pants).
Howard the Duck is notable as being one of the few characters to be used by both Marvel and Lucasfilm prior to both companies being bought by Disney.