What evidence suggests potential evolutionary differences among island populations?

Answer

Populations on Philippine islands versus those on Sunda Shelf islands may represent distinct lineages.

Geographical separation between groups inhabiting islands such as those in the Philippines and those on the Sunda Shelf islands (like Java or Sumatra) suggests that these spatially distinct groups may have developed into separate evolutionary lineages or subspecies.

What evidence suggests potential evolutionary differences among island populations?
habitatanimaldistributionPrimateMacaque