For ease of referencing later, I've got all 3 installations of the Bear Witnesses(es) together in one spot so I don't have to dig around in my YouTube favourites.
Bear Witness I (ignore the YouTube title, the track is by Dr. Octagon)
Bear Witness II
Bear Witness III
Batracobdella algira - Leeches and amphibians frequently interact with each other in nature, usually with the amphibian serving as food for the leeches, whether as eggs, tadpoles...