In one clip, a black wolf and a gray wolf slowly crossed a stream in the forest, the water nearly up to their bellies, before they leap onto the bank. A second clip, taken last fall, records two black wolves and a gray wolf fording the same stream.

The unusual sighting, captured last year on a video camera set up by SAVE Wildlife Conservation Fund Poland project coordinator Joanna Toczydłowska, has prompted the organization to collect scat (droppings) in the forest in the hopes of learning more about the black wolves' genetics.