Image from page 20 of "The American Museum Congo expedition collection of bats" (1917)
Title: The American Museum Congo expedition collection of bats
Year: 1917 (1910s)
Authors: Allen, J. A. (Joel Asaph Allen), 1838-1921; Herbert Lang, 1879-1957; James P Chapin
Subjects: Bats
Source: https://www.flickr.com/photos/internetarchivebookimages/18160432291/

The hammer-headed bat (Hypsignathus monstrosus), also known as the big-lipped bat, is a megabat widely distributed in equatorial Africa. The hammer-headed bat is a member of the family Pteropodidae. Hammer-headed bats are frugivores. Figs make up much of their diet, but they may also include mangos, bananas and guavas.