A small bat was observed dipping down to take a drink from the waters of Emerald Pool on the west side of Wizard Island at midday on August 23. Later it was seen zigzagging after flying insects. On August 17, this bat presumably was also observed in the early afternoon resting on one of the angular pieces of lava in the bright sunlight.

Later the specimen was collected for identification. It was a small bat with brownish body and black wings, and probably belongs to the genus Myotis although positive identification will be made by a specialist in the near future.

This is the first known record of a bat on Wizard Island and increases the number of reported species occurring on the island. Conies, golden mantled ground squirrels, deer mice, and mazama red-backed mice were collected by Ranger-Naturalist R. R. Huestis in 1937. The Klamath or Allen's chipmunk was listed prior to this date.