These small frogs can be 2-3 inches in length with females being larger than males. They sport large toe pads and can vary in color from brown to green as they are believed to be able to change color to match their surroundings and possible, as a reaction to high temperature, whereupon they turn yellow. Individuals can also be distinguished by a variety of dark markings that line their bodies, while their undersides usually sport lines of broken spots.
- Pacific Tree Frogs are social and often frequently heard in chorus.
- Interestingly, males will not let normal disturbances such as shaking or other sounds interrupt their songs, but they will temporarily stop if an intruder enters their territory.