Small big-eared brown bat

{{Short description|Species of bat}}

{{Speciesbox

| image = Histiotus montanus - Gabriel Ignacio Baloriani.jpg

| name = Small big-eared brown bat

| status = LC

| status_system = IUCN3.1

| status_ref = {{cite iucn |author=Barquez, R. |author2=Diaz, M. |date=2016 |title=Histiotus montanus |volume=2016 |page=e.T10202A22098875 |doi=10.2305/IUCN.UK.2016-3.RLTS.T10202A22098875.en |access-date=16 November 2021}}

| genus = Histiotus

| species = montanus

| authority = Philippi & Landbeck, 1861

| synonyms =

| range_map = Histiotus montanus map.svg

}}

The small big-eared brown bat (Histiotus montanus) is a species of vesper bat in the family Vespertilionidae. It can be found in Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Peru, Uruguay, and Venezuela.