Scent is a gameplay mechanic of Saurian. Currently, the scent is practiced while pressing 'E' in the computer's keyboard. When that key is pressed, the player will start to see clouds of different colours, as the borders of the screen become darker. The coloured clouds represent the odor that some animals leave behind and can be indicative that a certain animal was in the spot where the cloud remains or that the animal is currently in the cloud.
Scent particles vary in colour, and have different meanings. Yellow/Orange scent particles indicate the presence of carnivores. Palaeosaniwa, Acheroraptor, Dakotaraptor and Tyrannosaurus produce clouds of this colour. Green clouds indicate the presence of herbivorous animals like Chamops, Thescelosaurus, Pachycephalosaurus, Triceratops, Anatosaurus, Ankylosaurus, Denversaurus and ornithomimids, and also Didelphodon. Purple clouds show the existence of recntly dead bodies, although odorless animals often don't release scent particles, even when dead. Small animals, like Chamops, Palaeosaniwa, Didelphodon and ornithurans, are seen in a blue outline that reveals their presence, and this is useful to know if the animal is behind an obstacle. Some animals do not release sensible scent particles, like crocodylomorphs, Quetzalcoatlus, Mosasaurus, Lepisosteus and Basilemys.
Scent particles are only visible to a certain range. The player may have to press 'E' several times as you change position, so that you can see the scent clouds of the new position you have moved to.