Mesoplodon bidens (Sowerby's Beaked Whale)  

Sowerby's beaked whale is  the most northernly dstributed of the Atlantic Mesoplodon species, with most records above 30 degrees north in northern Europe, hence the high incidence of strandings records in the northern UK.  As with other members of this family, the species occurs in deep waters beyond the continental edge. Sightings in Hebridean waters are rare and almost all of the records for Outer Hebrides are of stranded animals

Additional Information
Hebridean Whale and Dolphin Trust
Cetacean Research & Rescue Unit