American Ornithologists' Union's "Check-list of North American Birds - List of the 2,078 Bird Species Known From the A.O.U. Check-list Area" (AOU Check-list, 7th edition, updated with Supplements 42-52), maintained at http://www.aou.org/
Reference for:
Podilymbus podiceps
Source:
IOC World Bird List, Master List v2.9
Acquired:
2011-08-26
Notes:
Master list and sub-lists are maintained at http://www.worldbirdnames.org/names.html, and 'virtually replace' Gill & Wright 2006 (Birds of the World, Recommended English Names)
Reference for:
Podilymbus podiceps
Source:
IOC World Bird List (v 5.4), website (version 5.4)
Acquired:
2015-10-24
Notes:
Gill, F., and D. Donsker, eds. 2015. IOC World Bird List (v 5.1). Available at http://www.worldbirdnames.org [Accessed 01 February, 2015]