Where do populations of the subspecies *N. p. islandicus* primarily breed?
Answer
Iceland, Greenland, and the Faroes
The text specifies distinct geographical separations even within the *Numenius phaeopus* species group that concerns Old World populations. The subspecies designated as *N. p. islandicus* is geographically restricted, breeding mainly in the North Atlantic regions, specifically naming Iceland, Greenland, and the Faroes as its primary breeding grounds. The migratory pathways for this subspecies are also noted, with Icelandic populations wintering as far west as West Africa, making their specific breeding location crucial for targeted conservation efforts.

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