The type of speciation event occurring in these whales is behavioral isolation.
Allopatric, peripatric, parapatric, and sympatric speciation are the four major types. Speciation is the process by which a new plant or animal species emerges. To occur, two new populations must form from one original population, and they must evolve in such a way that individuals from the two new populations cannot interbreed. Geographic separation causes allopatric speciation: The northern spotted owl and the Mexican spotted owl live in geographically distinct areas with distinct climates and ecosystems. Allopatric speciation is demonstrated by the owl.
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