This is a male. Even though breeding populations are widely separated, no geographic variation has been found. However the bill color in females apparently differs geographically with populations in Iceland having a dark band at the base of the bill while North American populations (both East and West) have an all yellow-orange bill during the non-breeding season. Canon PowerShot SX50 HS.
References:
Carboneras, C. & Kirwan, G.M. (2017). Barrow's Goldeneye (Bucephala islandica). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from http://www.hbw.com/node/52924 on 10 July 2017).
Eadie, John M., Jean-Pierre L. Savard and Mark L. Mallory.(2000).Barrow's Goldeneye (Bucephala islandica), The Birds of North America (P. G. Rodewald, Ed.). Ithaca: Cornell Lab of Ornithology; Retrieved from the Birds of North America:
https://birdsna.org/Species-Account/bna/species/bargol