Just a few examples of the 40+ animal-named hasta mudras (hand gestures) that exist can be found below. These have come from the book Mudras of India by C. Carroll & R. Carroll. See here for the full list of 40+ mudras. See here for comment on animal-named mudras of different kinds (i.e., not hands).
NB: Representations sourced from the Mudras of India book by Cain and Revital Carroll.