Screenwriter and Assistant director Francisco Payó González did the squawks and sounds that makes the peculiar "voice" of the mysterious bird Chichiluco.
The "scientific name" of the Chichiluco bird is Faragus Darwinikus.
An alternate title for the short during the screenwriting development was "The Last of the Chichilucans" (in original English), as a reference to the classic novel 'The Last of the Mohicans' created by James Fenimore Cooper. This reference was inspired not only by the phonetic similarities between the words "Chichilucan" and "Mohican" but also by the "native man and white man into the wilderness" story.