Vampire bats are social beings like we are. They like to groom each other and share food. But, when they feel bad, they call out less frequently and have fewer interactions with fellow bats. Researchers say it’s instinctual, not voluntary, and is similar to the lethargy we feel when we’re sick.
Source: New York Times, July 22, 2020. Link. So, they concluded that it is more likely that the bats are just feeling too lousy to call out, rather than intentionally stifling themselves as a naturally selected, personal sacrifice to prevent pathogen transmission to the group at large.
INSIGHTS: Stay away when you feel poorly.