This entry is odd is so many ways. The Curious Adventures of Mr. Wonderbird is an adaptation of the Hans Christian Andersen fairy tale of The Shepherdess and the Chimney Sweep. Production on the French animated film stopped suddenly in 1948, and its producer released it unfinished without the approval of its director or writer. This English-language version was released in 1952 starring Peter Ustinov as the bird, who narrates the story. Decades later, its director Paul Grimault acquired the rights to the film and finished it for a 1980 release. And the copy in the Internet Archive Feature Films collection is strangely misnamed “1989 summer drum party”.
Wikipedia writes that this movie is today regarded as a masterpiece of French animation and has been cited by the Japanese directors Hayao Miyazaki and Isao Takahata as an influence. I just think it’s a fun cartoon movie, and I’m glad that its IMDb rating was enough to get it into the IA Top 100.