Continuity mistake: The fossil of the lighter shown at the beginning of the film does not match how the lighter is pushed by the T-Rex into the mud later on as the text is face up. Since the lighter was pushed INTO the mud - the resulting fossil would have been flat with the words reversed on it.
Continuity mistake: When the mosquito is sucking on Dr. Marshall's neck, it keeps changing positions from higher up on his shoulder to more towards the front between shots. This is clear by watching the legs of the bug going from in front of his shoulder to being over the strap even when his head isn't moving.
Continuity mistake: When the team lands on the pile of bones, there is some sort of yellow stuff holding it together. The pile is also flush up against the sides of the cave. When the Vines grab them and its a far away show, the yellow stuff disappears and is now a loose pile of bones that's no longer flush against the cave sides.
Continuity mistake: When Dr. Mashall first sees the 'pole' and reaches for it, it appears to be 6 feet long. It is easily spun around without hitting the ground as he is examining it, unless he is 8 feet tall. Then he gets the idea to 'vault' over the T-Rex and runs toward the dinosaur. As it digs into the split between two rocks and he starts his ascent, we see the vertical 'pole' is suddenly about 10 1/2 feet tall, noting that the bottom of the animal's jaw is at about that level. As he rises, he springs forward and elevates with his feet to 13 feet, with the animal's jaw risen to that level as well. Dr Marshall is certainly not fat, but he is also not physically conditioned to be able to 'vault' 13 feet, and especially not with a 'jungle stick'.
Continuity mistake: When the raptors are attacking the ice cream truck, (specifically when some of them are slamming their bodies into the truck) they are shown with a small crest above their eyes, which are red. A few seconds later, they're shown with yellow eyes, and the crest is gone.