These are adults. Immatures are similar but have dusky facial freckling. This penguin has a southern circumpolar distribution with highest concentrations here in the Atlantic Subantarctic islands. Its diet is primarily Antarctic Krill which has exploded recently leading to significant penguin population increases. The Chinstrap is now one of the most numerous penguin species, second only to Macaroni Penguin. Canon PowerShot SX50 HS
Reference:
Martínez, I., Christie, D.A., Jutglar, F. & Garcia, E.F.J. (2018). Chinstrap Penguin (Pygoscelis antarcticus). 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 https://www.hbw.com/node/52460 on 8 June 2018).