The version of "Ol' Man River" by The Beach Boys used in the film is actually a combination of two versions: the first half is taken from the 2002 rarities compilation "Hawthorne, CA: Birthplace of a Musical Legacy" (which is the version available on the "Fantastic Mr. Fox" soundtrack,) while the second half is taken from a medley entitled "Old Folks At Home/Ol' Man River", available on the "Friends/20/20" two-fer.
Bean's helicopter is clearly modeled off of the helicopter in Magnum, P.I. and has the exact same paint scheme when viewed in long shots. However, a close up shot of the pilot in the cockpit shows the frame of the front canopy to be painted yellow, whereas it should be red in that section.
The film is clearly set in England, according to Mr. Fox's morning paper and other clues. But the wolf's alpine backdrop is like something out of the Rocky Mountains, and Kiley is an American opossum--there are no opossums or any marsupial relatives native to Europe. On the wackbat-trophy's champion-list there is an "M.K. Silvery-Marmoset", a creature found only in very limited areas in Brazil.
When Latin names of the animals are displayed in the film they are not written in the correct format. "Latin" names, more correctly termed scientific names, are standardized within the scientific community worldwide and written in a specific format, e.g. Genus species with the genus capitalized, the species written in lowercase, and both written either in italics or simply underlined. The film shows both genus and species capitalized.
Petey: [singing around a campfire with his banjo]
'Bout a handsome little fox let me sing you folks a yarn. / Hey, diddle-dee daddle-da doddle-do doodle-dum! / 'Twas a splendid little feller full of wit 'n' grace 'n' charm. / Say, zippy-zee zappa-za yappy-yo doodle-dum! / Well, like any little critter needin' vittels for his littl'uns, / Well, he stole, and he cheated, and he lied just to survive. / With a doodle-dum diddle-die doddle-diddle doodle-dum!
Yes, it is loosely based on Roald Dahl's 1970 novel Fantastic Mr Fox. It also borrows some elements from Danny, the Champion of the World (1973) by the same author.
How much sex, violence, and profanity are in this movie?
For detailed information about the amounts and types of (a) sex and nudity, (b) violence and gore, (c) profanity, (d) alcohol, drugs, and smoking, and (e) frightening and intense scenes in this movie, consult the IMDb Parents Guide for this movie. The Parents Guide for Fantastic Mr. Fox can be found here.