In the middle of the movie , the crocodile chews up the right pontoon on Hector's helicopter , but in the end of the movie as they are trying to trap the crocodile , the pontoon is undamaged.
When Kelly Scott falls out of the boat her life jacket is clearly wide open, but when she's seen in the water a moment later it is zipped up all the way.
When the deputy pulls up the anchor and the engine is started, he is in the back of the boat. In the next shot, as the boat starts to move, he is sitting in the front.
When the crocodile is shaking the chopper in its jaws, there is a small cliff in the background that was not there earlier in the scene. It is visible after Deputy Gare fires the first shot.
During the opening, when the game warden is looking inside the beaver dam and is attacked, he is not using the regulator. During the attack scene when the game warden is being dragged across the lake, the regulator is in his mouth again and you can clearly hear him screaming.
When Kelly is flying into Maine in the Cessna, she is not wearing a headset, but yet she talks to the pilot. This would be impossible due to the loudness of the engine.
Crocodiles can only survive in tropical climates. Way warmer than Maine.
Sheriff Keough says, "Crocodiles can't swim in salt water."
Actually, crocodiles are capable of swimming in in salt water, and many species live in it. Alligators, however, are limited to fresh water. Alligators can survive in saltwater for a few hours or even a day. They primarily live in freshwater.
Update: Sheriff Keough regularly displays his ignorance of crocodiles throughout the movie. Cyr regularly mocks his ignorance and is used as a point of humor in the movie.
Actually, crocodiles are capable of swimming in in salt water, and many species live in it. Alligators, however, are limited to fresh water. Alligators can survive in saltwater for a few hours or even a day. They primarily live in freshwater.
Update: Sheriff Keough regularly displays his ignorance of crocodiles throughout the movie. Cyr regularly mocks his ignorance and is used as a point of humor in the movie.
The bear depicted in the film is a black bear as it doesn't have the distinctive hump of a brown bear, and the coloring is that of a dark cinnamon phase black bear.
Large hair or fiber visible in top right of lens during helicopter shot as they paddle up the lake.
A couple times Hector criticizes Sheriff Hank for being fat, but meanwhile, Hector is just as fat.
When the crocodile has a hold of Hector's helicopter and the female deputy is shooting at it, the reports of her revolver are of a silenced or suppressed weapon, which it clearly is not.
The shadow of a camera on a tripod is briefly visible on the torso of Jack's shirt when he's talking to Kelly about US Wildlife. This is right before they look up at Hank dangling from the spring trap.
The opening high pan shot shows Camden Harbor - obviously on the coast. The sheriff's boat says "Aroostook County, which covers the northern third of the state and isn't remotely near the coast.
Scientist 'Hector Cyr' says that crocodiles have "Nictating membranes" over their eyes but the term is "Nictitating membranes".