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
Formicivora	Formicivora sp.	genus
Formicivora (Stymphalornis)	Stymphalornis sp. (Formicivora)	genus (synonym)
Formicivora (Neorhopias)	Neorhopias sp. (Formicivora)	genus (synonym)
Formicivora iheringi	Narrow-billed Antwren	full species
Formicivora [grisea or intermedia]	Southern White-fringed or Northern White-fringed Antwren	species group (or species)
Formicivora grisea	Southern White-fringed Antwren	full species (or nominal subsp)
Formicivora grisea grisea	Southern White-fringed Antwren (grisea)	nominal subspecies
Formicivora grisea grisea (grisea)	Southern White-fringed Antwren (grisea, sensu stricto)	nominal suspecies (sensu stricto)
Formicivora grisea grisea (deluzae)	Southern White-fringed Antwren (grisea, syn. deluzae)	junior synonym (or subspecies)
Formicivora grisea rufiventris	Southern White-fringed Antwren (rufiventris)	subspecies
Formicivora intermedia	Northern White-fringed Antwren	full species (or subspecies)
Formicivora intermedia intermedia	Northern White-fringed Antwren (intermedia)	nominal subspecies
Formicivora intermedia alticincta	Northern White-fringed Antwren (alticincta)	subspecies
Formicivora intermedia hondae	Northern White-fringed Antwren (hondae)	subspecies
Formicivora intermedia fumosa	Northern White-fringed Antwren (fumosa)	subspecies
Formicivora intermedia tobagensis	Northern White-fringed Antwren (tobagensis)	subspecies
Formicivora intermedia orenocensis	Northern White-fringed Antwren (orenocensis)	subspecies
Formicivora melanogaster	Black-bellied Antwren	full species
Formicivora melanogaster melanogaster	Black-bellied Antwren (melanogaster)	nominal subspecies
Formicivora melanogaster bahiae	Black-bellied Antwren (bahiae)	subspecies
Formicivora serrana	Serra Antwren	full species
Formicivora serrana [serrana or interposita]	Serra Antwren [serrana or interposita]	subspecies group (or species)
Formicivora serrana serrana	Serra Antwren (serrana)	nominal subspecies
Formicivora serrana interposita	Serra Antwren (interposita)	subspecies
Formicivora serrana littoralis	Serra Antwren (littoralis)	subspecies (candidate for split)