Blood-sucking flies may be following chemicals produced by skin bacteria to locate bats to feed on

We humans aren't the only animals that have to worry about bug bites. There are thousands of insect species that have evolved to specialize in feeding on different mammals and birds, but scientists are still learning how these bugs differentiate between species to track down their preferred prey. It turns out, the attraction might not even be skin-deep: a new study in Molecular Ecology found evidence that blood-sucking flies that specialize on bats may be locating their preferred hosts by following the scent of chemicals produced by bacteria on the bats' skin.

source https://phys.org/news/2021-07-blood-sucking-flies-chemicals-skin-bacteria.html