(at around 56 mins) In one sequence, the Spinosaurus, whilst pursuing the main characters, smashes through a huge metal reinforced fence to get to them. Seconds later the main characters run in a small wooden hut and the Spinosaurus isn't able to break into it. How can it smash a steel fence open yet not be able to even slightly damage a wooden hut?
(at around 46 mins) Eric has been alone on the island for eight weeks, yet his hair has not grown and is still more neatly combed than it would be without a comb.
(at around 22 mins) The blood on the windshield of the plane disappears as the plane is crashing.
(at around 1h 3 mins) In the opening scene the parachute says "dino-soar". After retrieving it Billy uses it in the aviary. When he first pulls it open there are no words on it, in the next scene with it the words return.
(at around 1h 22 mins) Trees suddenly appear on a previously treeless beach as the helicopter takes off.
(at around 1h 2 mins) Although the depiction of the Pteranodon showcases several inaccuracies (such as having teeth, being able to grab things with their legs, and being excessively aggressive), which, being genetically engineered clones, can be explained, one detail still counts as an error. Namely, no matter how strong these creatures are, they could never lift up and carry a human boy the size of Eric. They would simply plummet towards the ground, since these animals needed to be extremely light-weight in order to stay aloft (a real-life Pteranodon would weigh less than preschool child). Thus the Pteranodon's anatomical inaccuracies notwithstanding, the sequence in question very nearly breaks the laws of physics.
(at around 33 mins) The two D size batteries would not be able to supply either the correct voltage or the proper amount of current to power the camcorder.
(at around 33 mins) The Kirbys' camcorder is a Panasonic Digital "Palmcorder" (a PV-DV910 or similar), as evidenced by the distinctive zoom buttons, tape window, and connector for a light. It is a MiniDV (digital) camcorder, yet when Grant, Udesky, and the Kirbys play the tape that Eric and Ben shot, there are analog tape artifacts, most notably the static that appears during cuts and at the end of the tape. Static wouldn't appear on a MiniDV recording, and neither would analog tape artifacts (unless that is exactly what was recorded, which is highly unlikely with a working camcorder). The cuts would either be seamless (or the screen would turn blue), and at the end of the tape, the screen would turn blue, possibly preceded by a few milliseconds of a still of the last frame recorded. This is a common error in movies when digital camcorder footage is played.
(at around 48 mins) Eric has a bottle of Tyrannosaurus urine, which looks like the typical green liquid most people think of when they hear the word urine. However, this kind of urine is only produced by mammals, because they are the only animals that have both kidneys that are complex enough, and also a physical barrier between urethra and anus. Every other vertebrate makes nearly solid "urine" and releases it mixed with its feces.
(at around 17 mins) As the aircraft approaches the island, after air traffic control warns the pilot about violating the restricted airspace, Mr. Udesky correctly turns off all the audio switches on the panel for the King Air's radios. However when he leans back in his seat, looking over his left shoulder the airspeed indicator reads ZERO (12 o'clock) position. This wouldn't be the case if the plane were flying.
There are numerous instances where dinosaurs are portrayed in a manner inconsistent with widely published dinosaur hypotheses. These can be explained within the movie's world as errors or deliberate alterations by the characters who made the InGen cloning process.
There are numerous inconsistencies between this movie and the others in the Jurassic Park series. However, since they do not compromise the movie's own internal structure they cannot, legitimately, be classed as goofs.
The computer-generated Spinosaurus does not correspond with the practical version in terms of size. Compare the shots practical version holding Nash (the black mercenary) in its jaws to the shot of the computer-generated version trapping him under its foot and delivering the final bite. The CG creature looks nearly twice as big as the practical one in that shot.
(at around 56 mins) The "metal" wire ropes at the barrier fence where Alan and Eric reunite with rest of the survivors are obviously sash cords spray-painted gray. This is even more apparent when Alan and Eric run through the hole in the fence and the dangling ends of the broken ropes can be seen flopping around as they accidentally make contact with them.
(at around 59 mins) After escaping from the Spinosaurus and deciding not to drop the raptor eggs, the main characters go down the spiral staircase. Right before the metal stairs they find below break under the weight of Dr. Grant, the camera pans down the stairs and the clean cut where the stairs are about to break can clearly be seen two stairs down. The camera pulls back, and clean cuts can also be seen on the railings of both sides of the staircase just where it breaks.
(at around 18 mins) When they are in the plane flying over a field, the field is empty. However the dinosaurs show up in the next shot. Also when the fields are empty, you can't see anything up ahead.
When the man and boy begin para-sailing in the opening sequence, as they lift off from the boat an overhead shot looks down at them with the boat almost directly below them, but the boat is not moving and has no wake.
While separated Eric hears the satellite phone ringing and claims that it is Mr. Kirby's based on the ring tone. Mr. Kirby confirms later that it is HIS satellite phone, but at the start of the movie Udesky is shown to be the actual owner of the phone. The ringtone is the same "Kirby paint and tile in Westgate" as well and it is actually Kirby contacting Udesky for the first time.
The satellite phone's ringing can always be clearly heard, even when it's deep within the belly of a dinosaur or buried in a mound of dinosaur excrement.
During the Spinosaurus plane attack Paul Kirby leaves the plane and shouts "Amanda!". His lips clearly aren't moving in the shot so the line was obviously added post-production.
(at around 2 mins) A crew boat is visible in the background of one shot just before the parasailing boat enters the fog.
(at around 15 mins) As the plane is flying into Isla Sorna, the shadow of the helicopter filming the plane can be seen on the clouds.
(at around 38 mins) If you pay attention to the shadows when Dr. Grant is looking through the busted, dirty windows of the jeep before the group enters the compound, you can see the shadow of the tracking camera/crew briefly pass over the far interior of the vehicle just under the window and across the wheel well Grant is passing.
(at around 1h 16 mins) Wires visible on Paul while hanging off the crane.
(at around 25 mins) When the Spinosaurus is trying to attack the characters we see a white damaged airplane. When the Spinosaurus starts to crush the plane we see a brief green model of the plane being crushed with no window holes and a few cables inside visible. This might have been a second dummy airplane to prevent destructing the original.
(at around 10 mins) When Dr. Grant's team is excavating in the Montana Badlands, a wood thrush is heard in the background. The wood thrush isn't found in Montana and would certainly not be live in a desert environment.
(at around 55 mins) While celebrating Eric's return, Eric explains he followed Mr. Kirby's cell phone jingle. Then they turn around to see a Spinosaurus standing there. It would have been impossible for the Spinosaurus to have gotten there unnoticed since a T-Rex creates impact tremors with every step when it walks and a Spinosaurus is bigger, according to Grant, than a T-Rex. It is also impossible for it to have been there the whole time since no one seemed to notice it standing there.
(at around 39 mins) The food in the vending machines has been there for many years, not refrigerated or preserved, yet the candy bars and chips they take are not melted and edible.
(at around 11 mins) During the Montana dig site scene, Billy is carefully using a toothbrush to gently wipe away dirt from a dinosaur fossil while trying to impress his female co-worker. But at the same time, his arm and all its weight is leaning directly on a big part of the fragile fossil. No fossil expert would ever be so careless.
(at around 51 mins) Eric has survived several weeks in the water truck and knows he might need it again. But he leaves the hatch open, meaning anything might occupy it.
(at around 40 mins) While inside the Site-B main buildings, Billy uses his flash to photograph the dinosaur incubation tanks. Any photographer with a modicum of expertise would never use a flash when photographing a reflective surface (i.e. glass or water).
(at around 30 mins) When Grant asks Billy how he would classify the Spinosaurus, Billy says, "It's a super-predator," and immediately suggests Suchomimus. Grant says, "Think bigger," and Billy suggests Baryonyx. In reality, Baryonyx was only about 2/3 the size of Suchomimus, which in turn was only about 2/3 the size of Spinosaurus - not nearly big enough to be a super predator. Regardless of that fact, Billy still got his dinosaur sizes badly out of order.
(at around 1h 21 mins) When the Marines are disembarking the amphibious vehicles, one is seen getting off with his finger on the trigger of his rifle. Soldiers are specifically trained to keep their fingers off the trigger of their weapons to avoid accidental discharges, especially during the rapid disembarking of a vehicle.