Mammals
Sowerby's Beaked Whale
Mesoplodon bidens · also called Sowerbys beaked whale, North Sea beaked whale
Diving deep into the cool waters of the North Atlantic in pursuit of squid, Sowerby’s beaked whale holds a quiet but significant place in scientific history, the very first member of its genus ever formally described following a chance stranding on a Scottish beach over two centuries ago.
Overview
Sowerby’s beaked whale, Mesoplodon bidens, is a cold-water specialist native to cool temperate waters across the North Atlantic, including areas around the British Isles and Scandinavia. Its historical status as the first formally described member of its genus, tolerance for notably cool water, and genuine rarity of live observation make it one of the more scientifically foundational, if still poorly understood, members of the beaked whale family.
The whale that started a genus
Long before other Mesoplodon beaked whale species were even recognised, a single stranded specimen in Scotland gave science its first formal look at this entire group, making Sowerby’s beaked whale a quiet but genuine milestone in marine mammal taxonomy.
Status
Least Concern, present across suitable cool North Atlantic ocean habitat, though its naturally elusive lifestyle makes precise population assessment genuinely difficult.
Sowerby's Beaked Whale: common questions
Why is Sowerby's beaked whale historically significant?
This species was the first member of its genus ever formally described by science, based on a specimen that stranded in Scotland in the early 19th century, making it a historically important reference point for the entire Mesoplodon group of beaked whales that followed.
How cold is the water Sowerby's beaked whale lives in?
This species favours notably cool waters within the North Atlantic, including areas around the British Isles and Scandinavia, tolerating conditions colder than several other beaked whale species found in warmer parts of the Atlantic Ocean.
Why is Sowerby's beaked whale rarely seen alive?
This species is rarely observed alive at sea due to its deep-diving lifestyle, spending extended periods far below the surface in pursuit of squid, meaning much of the available scientific knowledge about this species comes from examining stranded individuals rather than direct observation in the wild.
How can Sowerby's beaked whale be identified?
A male of this species develops a single pair of teeth positioned partway along the lower jaw, visible even when the mouth is closed, a feature that helps distinguish stranded specimens, though close examination is often needed to separate this species from other closely related beaked whales.