The photographer actually had a pretty harrowing experience after taking this shot, because after he’d removed his protective gear as he exited the cave, the colony suddenly decided to exit in order to feed. He got hit with burning guano in one eye, and these bats evidently commonly had Marburg virus, which is similar to Ebola. He had potentially a couple weeks left to live at that point…

Here’s more of his awesome stuff:
https://www.joelsartore.com/photos-videos/

And his Nat’l Geo article telling the tale:
https://web.archive.org/web/20120121075053/http://ngm.nationalgeographic.com/2011/11/albertine-rift/sartore-essay