At several points throughout the film, starting from the first town scene, House Sparrows are heard calling in the background. However this species was not introduced to the US from Europe until 1852, and only then in New York.
In the campfire scene where John Morris and Hermann Kermit Warm are eating, the camera pans between the two characters several times during their conversation, and in those brief moments, the spoon Hermann Kermit Warm
is eating with switches 4 times from his left to right hand.
At 23:20 he's eating with left hand.
At 23:34 he's eating with right hand.
At 23:54 he's eating with left hand.
At 24:12 he's eating with right hand.
At 24:24 he's eating with left hand.