big brown bat


: an insectivorous medium-sized bat (Eptesicus fuscus) having brownish fur that is found from southern Canada to northern South America and that often roosts in buildings

Example Sentences

Recent Examples on the Web In the first study, published in December, a team of scientists from the USGS, the University of Wisconsin, and Louisiana State University found that the big brown bat (Epstesicus fuscus), one of the most common in the United States, was resistant to infection by the virus. Eric Niiler, Wired, 1 July 2021 Even a notable exception, the big brown bat, has seen a 30 percent decline — a serious problem, but not when compared to the types of bat that have seen two or three times that decline. Christopher Arnott, Hartford Courant, 10 Sep. 2022 The state's two most-common bat species are the little brown bat and the big brown bat. Allen Kim, CNN, 26 May 2020 These species include big brown bat, silver-haired bat, eastern red bat, hoary bat, evening bat and eastern myotis. Sheryl Devore, Lake County News-Sun, 23 Apr. 2018 Little brown bats tend to roost in barns and sheds in colonies of 30 or more, while big brown bats [which are not endangered] have roost sites in attics and in people’s houses in colonies of 10. Margeaux Sippell,, 16 Apr. 2018 For instance, a study published last fall in PLOS Biology explored the reason that big brown bats waggle their heads like puppy dogs and curl the tips of their ears down. Jason Bittel, Smithsonian, 23 Mar. 2017 In the same study, the researchers estimated that a colony of 150 big brown bats in Indiana ate nearly 1.3 million insects per year, and a million bats would consume 600 to 1,320 metric tons of insects per year. Rachel E. Gross, Smithsonian, 27 Oct. 2017 In one experiment, a big brown bat (Eptesicus fuscus) hibernated in a refrigerator for 344 days, suggesting bats may deserve the title (although, the animal didn’t exactly choose to and didn’t survive the feat). Christie Wilcox, National Geographic, 12 Oct. 2017 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'big brown bat.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1898, in the meaning defined above

Time Traveler
The first known use of big brown bat was in 1898

Dictionary Entries Near big brown bat

Cite this Entry

“Big brown bat.” Dictionary, Merriam-Webster, Accessed 30 May. 2023.

More from Merriam-Webster on big brown bat

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!