Ancestral Pest [two-actions] Feat 5

You assume the form of a tiny animal, gaining the effect of a 1st-rank pest form, except you can transform only into a creature that matches the listed entry, and you can use your normal base Speed if it's higher than what the battle form grants. If the listed creature is normally larger than Tiny, you transform into a smaller, younger version of the animal. If the listed creature usually has a swim Speed, Ancestral Pest grants you a swim Speed of 20 feet.

Option(s): original animal