Rhynchostruthus louisae - The Somali Grosbeak or Somali Golden-winged Grosbeak is a finch endemic to northern Somalia. It is included as a subspecies in R. socotranus by some authorities, but in recent times the three golden-winged grosbeak populations are usually considered distinct species.
Rhynchostruthus percivali - The Arabian Grosbeak or Arabian Golden-winged Grosbeak is a finch found in Saudi Arabia, Oman and Yemen. It is included as a subspecies in R. socotranus by some authorities, but in recent times the three golden-winged grosbeak populations are usually considered distinct species.
Golden-winged Grosbeak - The Socotra Grosbeak or Socotra Golden-winged Grosbeak is a finch endemic to Socotra, an island in the Indian Ocean off the coast of Yemen. R. socotranus is by some authorities held to be the only species of the then-monotypic genus Rhynchostruthus, including all other golden-winged grosbeaks therein as subspecies. But in recent times the three populations are usually considered a distinct species, with R. socotranus being limited to the Socotra population, the Arabian Grosbeak becoming R. percivali, and the Somali Grosbeak R. louisae.