Sperm whales are a transient cetacean species seen on Madeira dolphin and whale watching tours. While they can be seen with some frequency all year they are more common during the fall months. Sperm whales live in groups of females and juvenile males with unique cultures, dialects, traditions and habits – just like human beings in our families. Adult males usually live solitary lives and migrate long distances. Individual Sperm whales can be identified with a good photo of their tail which helps scientists track their migration as they move around the Macaronesian peninsula.