True's beaked whale (Mesoplodon mirus)
|Researched by||Morvan Barnes||Refereed by||Admin|
|Other common names||-||Synonyms||-|
Recorded distribution in Britain and IrelandExpected to occur west of the Outer Hebrides and west of Ireland.
HabitatTrue's beaked whale is an oceanic species that may be seen at the surface but little is known on what depth they may dive to.
- Up to 5.3 m in length.
- Small dorsal fin two-thirds down the body.
- Distinct, moderately long beak.
- Small head with shallow rising and smoothly bulging forehead.
- Pair of V-shaped throat grooves.
- Mouthline curved down at the rear.
- Dark marking around the eyes.
- Teeth at front of the mouth.
Additional informationTrue's beaked whale may be confused with Sowerby's beaked whale Mesoplodon bidens but can be recognised by its bulging but smooth forehead and its slightly shorter beak. Little is known about the aggregational behaviour of True's beaked whales but it is not expected to differ from similar species such as Mesoplodon bidens (Kinze, 2002).
Bruyns, W.F.J.M., 1971. Field guide of whales and dolphins. Amsterdam: Publishing Company Tors.
Howson, C.M. & Picton, B.E., 1997. The species directory of the marine fauna and flora of the British Isles and surrounding seas. Belfast: Ulster Museum. [Ulster Museum publication, no. 276.]
Jefferson, T.A., Leatherwood, S. & Webber, M.A., 1994. FAO species identification guide. Marine mammals of the world. Rome: United Nations Environment Programme, Food and Agriculture Organization of the United Nations.
Kinze, C. C., 2002. Photographic Guide to the Marine Mammals of the North Atlantic. Oxford: Oxford University Press.
Reid. J.B., Evans. P.G.H., Northridge. S.P. (ed.), 2003. Atlas of Cetacean Distribution in North-west European Waters. Peterborough: Joint Nature Conservation Committee.
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Last Updated: 02/06/2008