Beaked Whale Identification Guide
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Lateral view of H. planifrons head
 
Lateral view of B. bairdii head
Medium length rostrum is only slightly undershot, lower mandible extends anterior to maxilla by less than 5 cm.

Insertion angle of melon onto the rostrum approaches 90 degrees.
 
Elongate rostrum has an exaggerated undershot appearance, lower mandible extends anterior to maxilla by more than 5 cm.

Insertion angle of melon onto the rostrum can approach up to 75 degrees.
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