L. spectabilis  remarkable, showy  < spectare  to observe  < specere  to look at.
● ex “Grey-headed Duck” of Edwards 1751, and Linnaeus 1754 (ex Rudbeck unpublished fig.) (Somateria).

Search for more names on the Key to Scientific Names in Ornithology by James A. Jobling.
Recommended citation
Jobling, J. A. (2018). Key to Scientific Names in Ornithology. In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.) (2018). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from www.hbw.com on 11 December 2018).