Avibase - The World Bird Database

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There are more than 20,000 regional checklists in Avibase, offered in 9 different taxonomies, including synonyms more than 175 languages. Each checklist can be viewed with photos shared by the birding community, and also printed as PDF checklists for field use.
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Scientific name	Common name	Status
Podilymbus	Podilymbus sp.	genus
Podilymbus podiceps	Pied-billed Grebe	full species
Podilymbus podiceps podiceps	Pied-billed Grebe (podiceps)	nominal subspecies
Podilymbus podiceps antarcticus	Pied-billed Grebe (antarcticus)	subspecies
Podilymbus podiceps antillarum	Pied-billed Grebe (antillarum)	subspecies
Podilymbus podiceps magnus	Pied-billed Grebe (magnus)	fossil subspecies (extinct)
Podilymbus gigas	Atitlan Grebe	full species
Podilymbus mujusculus		fossil species (extinct)
Podilymbus wetmorei		fossil species (extinct)
Podilymbus pisanus		fossil species (extinct)
Podilymbus howardae		fossil species (extinct)
Podilymbus magnus		fossil species (extinct)
Podilymbus [gigas x podiceps]	Atitlan x Pied-billed Grebe (hybrid)	hybrid
Tachybaptus	Tachybaptus sp.	genus
Tachybaptus [ruficollis or novaehollandiae]	Little or Australasian Grebe	species group (or species)
Tachybaptus ruficollis	Little Grebe	full species (or nominal subsp)
Tachybaptus ruficollis [ruficollis, incl. collaris]	Little Grebe [ruficollis, incl. collaris]	subspecies group (alt)
Tachybaptus ruficollis [ruficollis]	Little Grebe [ruficollis]	subspecies group (or species)
Tachybaptus ruficollis ruficollis	Little Grebe (ruficollis)	nominal subspecies
Tachybaptus ruficollis [capensis or albescens]	Little Grebe [capensis or albescens]	subspecies group (or species)
Tachybaptus ruficollis capensis	Little Grebe (capensis)	nominal subspecies
Tachybaptus ruficollis albescens	Little Grebe (albescens)	subspecies
Tachybaptus ruficollis iraquensis	Little Grebe (iraquensis)	subspecies
Tachybaptus ruficollis poggei	Little Grebe (poggei)	subspecies
Tachybaptus ruficollis poggei (poggei)	Little Grebe (poggei, sensu stricto)	nominal suspecies (sensu stricto)