Their vision operates mainly in the infrared portion of the electromagnetic spectrum; they can easily detect heat differentials in their surroundings but are unable to easily distinguish among objects of the same relative temperature.[13] A Predator bio-mask increases its ability to see in a variety of spectra, ranging from the low infrared to the high ultraviolet, and also filters the ambient heat from the area, allowing them to see things with greater clarity and detail.[5] While they are capable of breathing Earth's atmosphere,[13] the creature in Predator 2 is seen using a breathing mask after losing his helmet (although this Predator had just been shot multiple times and may have, therefore, not been operating at his full potential.