Goofs for
Fantastic Mr. Fox (2009) More at IMDbPro »

• Errors in geography: The film avoids identifying its setting as either Britain or America. Conveniently, Mr. Fox's species Vulpes vulpes is found in both countries. The human town has some very British details including a round red post box (American would be square and blue), the station wagon has a right-hand drive, and the humans have British accents. (Even if the setting is England, the animals' American accents are permissible as an element of fantasy.) The beaver's species is given as Castor fiber, the Eurasian variety (the American variety is Castor canadensis). However, the wolf's mountain looks more like a place in America or Canada, and more conclusively, there is an American opossum among the animals. There are no native opossums, nor any marsupial relatives, anywhere in Europe, so an opossum cannot be from the same region as Castor fiber.
  
  
• Errors made by characters (possibly deliberate errors by the filmmakers): Mr. Fox says he can't say opossum in Latin because the ancient Romans had no word for it. The ancient Romans are irrelevant, as Latin has lived on as a scientific language ever since the general public stopped speaking it. Swedish Carolus Linnaeus (who Latinised his own name from Carl Von Linne') developed the Latin animal double-names in the mid-1700s, and thousands of new names have been added to that list regularly for at least 230 years. The name for opossum in this system is Didelphis virginiana.
  
  
• Errors made by characters (possibly deliberate errors by the filmmakers): The rabid beagle's tag reads Canis familiaris, an obsolete classification. Tame dogs (familiaris) are now considered to be a subspecies of the wolf Canis lupus (which Fox correctly identified on the mountain), rather than their own species. Since news of species revisions travels slowly, it is realistic that not everyone has heard of the change.
  
  

• Continuity: In long-shots, there is a building between the second and third of the four silos on the Bean farm ("E" and "A"). In closer angles, the silos are equally spaced and the building is not readily visible.
  
  

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