Two rare black wolves caught on camera in Polish forest by wildlife researchers

A rare black wolf crossing a stream in a Polish forest last summer (SAVE Wildlife Conservation Fund Poland via AP)

Two rare black wolves, likely to be siblings, were spotted on camera crossing a stream in a Polish forest, a conservation organisation has said.

The unusual sighting was captured last year on a video camera set up by SAVE Wildlife Conservation Fund Poland project co-ordinator Joanna Toczydlowska.