The Western Canary Islands goldcrest (Regulus regulus ellenthalerae) is a subspecies of the goldcrest. It is restricted to the western Canary Islands of La Palma and El Hierro where it is a non-migratory resident.
Previously thought to be the same taxon as the Tenerife Goldcrest (Regulus regulus teneriffae), it was separated as a distinct subspecies of the goldcrest which apparently evolved from an independent colonisation of the islands 1.3–1.8 million years ago.Päckert, Martin; Dietzen, Christian; Martens, Jochen; Wink, Michael & Kvist, Laura: Radiation of Atlantic goldcrests Regulus regulus spp.: evidence of a new taxon from the Canary Islands. Journal of Avian Biology 37(4): 364-380.
References