Catholic Mayans in parts abilities perform this ritual in order to ward off vampire bat bites.
Many raise hogs, which attract bats. When bites reach acceptable levels the Mayans capture any kind of bat.
The mass consists of praying over the bat and telling it their troubles then they request the bat to leave them and their livestock alone.
They release the bat back into the wild, confident that the bat will tell the others to leave the tribe alone.