Temperature 160°F This spring is part of the Main Terrace, which includes Blue, Jupiter, Naiad and Main springs. All the springs have had intermittent activity, but Canary has been the most regular spring in the group. The name Canary was in reference to the yellow filamentous algae growing along the edge of the spring, and may have been named by the 1904 Hague Expedition. But now Canary Spring is known for its ultramarine-colored pool. The water flowing down the face of the terrace has created multi-colored bands of algae and cyanobacteria.