Indominus rex, the main antagonist introduced in Jurassic World, was demonstrated to be able to blend herself quite well to her surroundings, making her practically invisible to the naked eye in the forest.
This ability was proven to be ultimately useful for eliminating (or should I say hunting down) her aggressors exclusively in the scene where she literally ripped a battalion of trained men complete with weapons and protections apart.
It is also known that the I. rex was notably smarter than most of the dinosaurs (probably because she was part 'raptor). This was also proven in the scene where she fooled the guards thinking that she had escaped by making fake claw marks and lowering her body temperature, so that she'd be invisible to the thermal camera that constantly monitored her enclosure.
Given those facts, shouldn't she be aware of how powerful her camouflage ability could've been and how it could've helped her to become a better predator?
Had she utilized this ability more, she could've fled the battle scene with Owen and the rest of the ACU units (the one where the Raptors betrayed Owen) quicker and with less damage done to her part.
Heck, she had probably won the battle with Rexie had she opted to camo between the park ruins - considering the fact that they were battling at night time.
So.. why? Why does a dinosaur created to be the ultimate killing machine with all the brawn and the brains needed to do so fail to see her own potential, despite her mature age and formerly demonstrated intelligence?