What are more likely to evolve on islands specialist or generalist

Specialists are the species that are more likely to evolve on islands.

Explanation:

This is because, Islands have specific conditions, that is harsh environments, that make the species thre evolve to specialists in order to adapt to the harsh Island environment's specific niches.

Inasive species to Islands that might be generalists, have to adapt to become specialists over time in terms of survival in the Islands new harsh conditions.

An example of a specialist species is a tiger.