Euderma maculatum
Side view
Conservation status
Least Concern  (IUCN 3.1)[1]
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Chiroptera
Family:	Vespertilionidae
Tribe:	Plecotini
Genus:	Euderma H. Allen, 1892
Species:	E. maculatum
Binomial name
Euderma maculatum (Allen, 1891)
Synonyms
Euderma maculata (Allen, 1891) Histiotus maculatus Allen, 1891

The spotted bat (Euderma maculatum) is a species of vesper bat and the only species of the genus Euderma.

The spotted bat was first described by zoologist Joel Asaph Allen from the American Museum of Natural History in 1891. It can reach a length of 12 cm and a wingspan of 35 cm. The weight is about 15 g. It has three distinctive white spots on its black back. With ears that can grow up to 4 cm, it is said to have the largest ears of any bat species in North America.^[2] The spotted bat's mating season is in autumn and the females produce their offspring (usually one juvenile) in June or July. Its main diet is grasshoppers and moths.

The habitats of the spotted bat are undisturbed roosts on cliffs along the Grand Canyon in Arizona, and open and dense deciduous and coniferous forests, hay fields, deserts, marshes, riparian areas, and dry shrub-steppe grasslands in Arizona, California, Colorado, Oregon, New Mexico, Utah, Washington, and British Columbia, Canada.

Use of pesticides such as DDT and other insecticides in the 1960s led to a severe decline in the spotted bat population, but current observations had shown that it is more common than formerly believed. Abundance, population trend, and threats are widely unknown.

• Bats of Canada
• Bats of the United States

• David J. Schmidly, William B. Davis: The mammals of Texas University of Texas Press, 2004 ISBN 978-0-292-70241-7
• B. J. Verts, Leslie N. Carraway: Land mammals of Oregon. University of California Press, 1998 ISBN 9780520211995

• Spotted Bat