From Pathfinder Lost Omens Ancestry Guide, which isn't enabled.

Animal Speaker

FEAT 5

Prerequisites ability to communicate with some type of animals (such as bats or arthropods)

You can speak to all animals, not just a particular subset. You gain a +1 circumstance bonus to Make an Impression on animals (which usually uses the Diplomacy skill).

Pathfinder Lost Omens Ancestry GuideOGL