Gray wolf. Black variant of the gray wolf (Canis lupus) with a collar at the Wolf Science Center, Austria. This research laboratory explores the similarities and links between wolves, dogs and humans. Wolves are raised by humans and maintain a close relationship with their handlers. The researchers study how the wolves behave through observation and cognitive experiments. The collar is the same used by large police dogs and is only worn during experiments. It is removed when the wolf returns to its pack.