This film was shot with standard 16mm color film stock, which has a TV-Monitor aspect ratio of 4:3 (or 1.33:1). So all VHS and DVD editions that look like they are "pan and scan" are really fullscreen.
No real humans are featured - several characters in this movie are played by actors in suits - such as Heidi (hippo), Bletch (walrus), Cederic (wart hog), Sid (elephant), Daisy (cow) and Barry (bulldog)- and all other characters are puppets.
Served as inspiration for the Australian children's television series ''The Ferals'' according to one of the creators Wendy Grey. Peter Dasent, who composed the film, also provided the score for this series.