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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
Onychoprion	Onychoprion sp.	genus
Onychoprion (Melanosterna)	Melanosterna sp. (Onychoprion)	genus (synonym)
Onychoprion aleuticus	Aleutian Tern	full species
Onychoprion lunatus	Grey-backed Tern	full species
Onychoprion anaethetus	Bridled Tern	full species
Onychoprion anaethetus anaethetus	Bridled Tern (anaethetus)	nominal subspecies
Onychoprion anaethetus anaethetus (anaethetus)	Bridled Tern (anaethetus, sensu stricto)	nominal suspecies (sensu stricto)
Onychoprion anaethetus anaethetus (rogersi)	Bridled Tern (anaethetus, syn. rogersi)	junior synonym (or subspecies)
Onychoprion anaethetus anaethetus (novaehollandiae)	Bridled Tern (anaethetus, syn. novaehollandiae)	junior synonym (or subspecies)
Onychoprion anaethetus melanopterus	Bridled Tern (melanopterus)	subspecies
Onychoprion anaethetus melanopterus (melanopterus)	Bridled Tern (melanopterus, sensu stricto)	nominal suspecies (sensu stricto)
Onychoprion anaethetus melanopterus (recognitus)	Bridled Tern (melanopterus, syn. recognitus)	junior synonym (or subspecies)
Onychoprion anaethetus antarcticus	Bridled Tern (antarcticus)	subspecies
Onychoprion anaethetus antarcticus (antarcticus)	Bridled Tern (antarcticus, sensu stricto)	nominal suspecies (sensu stricto)
Onychoprion anaethetus antarcticus (fuligulus)	Bridled Tern (antarcticus, syn. fuligulus)	junior synonym (or subspecies)
Onychoprion anaethetus nelsoni	Bridled Tern (nelsoni)	subspecies
Onychoprion fuscatus	Sooty Tern	full species
Onychoprion fuscatus fuscatus	Sooty Tern (fuscatus)	nominal subspecies
Onychoprion fuscatus [nubilosus or infuscatus]	Sooty Tern [nubilosus or infuscatus]	subspecies group (or species)
Onychoprion fuscatus nubilosus	Sooty Tern (nubilosus)	subspecies
Onychoprion fuscatus nubilosus (nubilosus)	Sooty Tern (nubilosus, sensu stricto)	nominal suspecies (sensu stricto)
Onychoprion fuscatus nubilosus (somaliensis)	Sooty Tern (nubilosus, syn. somaliensis)	junior synonym (or subspecies)
Onychoprion fuscatus infuscatus	Sooty Tern (infuscatus)	subspecies
Onychoprion fuscatus [serratus or kermadeci]	Sooty Tern [serratus or kermadeci]	subspecies group (or species)
Onychoprion fuscatus serratus	Sooty Tern (serratus)	subspecies