Beaked Whale Identification Guide
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Lateral view ofH. ampullatus head
 
Lateral view of M. mirus head
Medium length rostrum clearly distinct from bulbous melon.

Insertion angle of melon onto the rostrum can approach 90 degrees.
 
Rostrum not easily distinguishable from melon, these features merge seamlessly together.

Melon may appear flat or as a slight bulge in the forehead.
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