Biosyn Guard dinosaurs theory

Theri likely heard the crash from the parachute and came to investigate. It then used its echolocation to look for clues of what happened, and when Claire went underwater, the sound bounced back off the water so the Theri gave up looking in the water.

Well the Quetz never attacked Kayla because Biosin had a way of keeping the "Pteradactyls and sh**" down, but it was turned off so the Pterosaurs would attack, and I bet the Quetz was just trying to be a little sh**