- Northern Fiscal
- Northern Flame Bowerbird
- Northern Flicker
- Northern Fulmar
- Northern Gannet
- Northern Giant-Petrel
- Northern Giant Petrel
- Northern Golden-Bulbul
- Northern Golden Bulbul
- Northern Goshawk
- Northern Gray-headed Sparrow
- Northern Grey-headed Sparrow
- Northern Grey Tit
- Northern Grosbeak-Canary
- Northern Ground-Hornbill
- Northern Ground Hornbill
- Northern Harrier
- Northern Hawk-Cuckoo
- Northern Hawk-Owl
- Northern Hawk Owl
- Northern Hen-Harrier
- Northern Hepatic Tanager
- Northern Hobby
- Northern House-Martin
- Northern House Martin
- Northern Ireland
- Northern Island Saddleback
- Northern Jacana
- Northern Jery
- Northern Kaka
- Northern Lapwing
- Northern Logrunner
- Northern Long-eared Owl
- Northern Mariana Islands
- Northern Marianas
- Northern Marianas Islands
- Northern Marquesan Fruit-Dove
- Northern Marquesan Fruit Dove
- Northern Marquesan Reed-Warbler
- Northern Marquesan Reed Warbler
- Northern Masked-Weaver
- Northern Masked Weaver
- Northern Mealy Amazon
- Northern Mockingbird
- Northern Moluccas
- Northern Mountain-Cacique
- Northern Mountain Cacique
- Northern Muted Cuckoo
- Northern Nightingale-Wren
- Northern Nightingale Wren
- Northern Ohio
- Northern Oriole
- Northern Paradise-Whydah
- Northern Paradise Whydah
- Northern Parrotbill
- Northern Parula
- Northern Parula Warbler
- Northern Pied-Babbler
- Northern Pied Babbler
- Northern Pied Hornbill
- Northern Pintail
- Northern Potoo
- Northern Puffback
- Northern Pygmy-Owl
- Northern Pygmy Owl
- Northern Raven
- Northern Red-billed Hornbill
- Northern Red Bishop
- Northern Redpoll
- Northern Robin
- Northern Rockhopper Penguin
- Northern Rosella
- Northern Rough-winged Swallow
- Northern Royal Albatross
- Northern Royal Flycatcher
- Northern Rufous-naped Brush-Finch
- Northern Rufous-naped Brush-finch
- Northern Rufous-naped Brush Finch
- Northern Rufous-naped Brushfinch
- Northern Saw-whet
- Northern Saw-whet Owl
- Northern Schiffornis
- Northern Screamer
- Northern Scrub-Flycatcher
- Northern Scrub-Robin
- Northern Scrub Flycatcher
- Northern Scrub Robin
- Northern Shoveler
- Northern Shrike
- Northern Shrike-thrush
- Northern Shrike-tit
- Northern Shrike Thrush
- Northern Shrike Tit
- Northern Shriketit
- Northern Silvery-Kingfisher
- Northern Silvery Kingfisher
- Northern Slaty-Antshrike
- Northern Slaty Antshrike
- Northern Sooty-Woodpecker
- Northern Sooty Woodpecker
- Northern Starling
- Northern Tawny-bellied Screech-Owl
- Northern Tawny-bellied Screech Owl
- Northern Territories
- Northern Territory
- Northern Thickhead
- Northern Tufted Flycatcher
- Northern Variable Pitohui
- Northern Violaceous Trogon
- Northern Waterthrush
- Northern Wattled-Honeyeater
- Northern Wattled Honeyeater
- Northern Waved Hornbill
- Northern Wheatear
- Northern White-crowned Shrike
- Northern White-crowned Tapaculo
- Northern White-faced Owl
- Northern White-fringed Antwren
- Northern White-rumped Babbler
- Northern White-tailed Bush-Lark
- Northern White-tufted Sunbeam
- Northern Wren
- Northern Wryneck
- Northern Yellow-billed Hornbill
- Northern california
- Northern or Common Potoo
- Northern or Sahel Paradise Whydah
- Northern tawny-bellied screech-owl
- Northiella
- Northiella haematogaster
- Northiella haematogaster haematorrhoa
- Northiella haematogaster haematorrhous
- Northiella narethae
- Northumberland
- Northward Hill RSPB Reserve and Halstow Marshes
- Northward Hill and Halstow Marshes
- Northwest Branch State Park and area (now Rachel Carson Park)(Silver Spring)
- Northwest Territories
- Northwestern Crow
- Norway
- Noss
- Noss Shetland Islands
- Noss Shetland Islands, Scotland
- Nosterfield Local Nature Reserve
- Notch-tailed Treepie
- Notharchus
- Notharchus hyperrhynchus
- Notharchus macrorhynchos
- Notharchus ordii
- Notharchus pectoralis
- Notharchus subtectus
- Notharchus swainsoni
- Notharchus tectus
- Nothocercus
- Nothocercus bonapartei
- Nothocercus julius
- Nothocercus nigrocapillus
- Nothocrax
- Nothocrax urumutum
- Nothoprocta
- Nothoprocta cinerascens
- Nothoprocta curvirostris
- Nothoprocta kalinowskii
- Nothoprocta ornata
- Nothoprocta pentlandii
- Nothoprocta perdicaria
- Nothoprocta perdicaria perdicaria
- Nothoprocta taczanowskii
- Nothura
- Nothura boraquira
- Nothura chacoensis
- Nothura darwinii
- Nothura maculosa
- Nothura minor
- Nothuras
- Notiochelidon
- Notiochelidon cyanoleuca
- Notiochelidon cyanoleuca cyanoleuca
- Notiochelidon flavipes
- Notiochelidon murina
- Notiochelidon pileata
- Notiomystidae
- Notiomystis
- Notiomystis cincta
- Notiomystis cincta hautura
- Notopholia
- Notopholia corrusca
- Nottinghamshire
- Nouhuys's Melidectes
- Noup Cliffs
- Noup Cliffs Orkney Islands
- Noup Cliffs RSPB Reserve Orkney Islands, Scotland
- Nova Scotia
- Nubian Bustard
- Nubian Nightjar
- Nubian Woodpecker
- Nucifraga
- Nucifraga caryocatactes
- Nucifraga caryocatactes macrorhynchos
- Nucifraga caryocatactes owstoni
- Nucifraga columbiana
- Nucifraga multipunctata
- Nuevo Leon
- Nuku Hiva Monarch
- Nukuhiva Imperial-Pigeon
- Nukuhiva Imperial Pigeon
- Nukuhiva Monarch
- Nukupuu
- Nullarbor Quail-thrush
- Nullarbor Quail Thrush
- Numali Apalis
- Numenius
- Numenius Phaeopus
- Numenius americanus
- Numenius arquata
- Numenius borealis
- Numenius hudsonicus
- Numenius madagascariensis
- Numenius minutus
- Numenius phaeopus
- Numenius phaeopus hudsonicus
- Numenius tahitiensis
- Numenius tenuirostris
- Numensius arquata orientalis
- Numfor Paradise-Kingfisher
- Numfor Paradise Kingfisher
- Numida
- Numida meleagris
- Numididae
- Nuthatch-Vanga
- Nuthatch Vanga
- Nuthatch range in Scotland
- Nutmeg Mannikin
- Nuttall's Woodpecker
- Nutting's Flycatcher
- Nuwara Eliya
- Nyanza Swift
- Nyasa Seedcracker
- Nyasaland Seedcracker
- Nyctanassa
- Nyctanassa Violacea
- Nyctanassa violacea
- Nyctanassa violacea bancrofti
- Nyctanassa violacea cayennensis
- Nyctanassa violacea pauper
- Nyctanassa violacea violacea
- Nyctea
- Nyctea scandiaca
- Nyctibiidae
- Nyctibius aethereus
- Nyctibius bracteatus
- Nyctibius grandis
- Nyctibius griseus
- Nyctibius griseus griseus
- Nyctibius griseus panamensis
- Nyctibius jamaicensis
- Nyctibius leucopterus
- Nyctibius maculosus
- Nycticorax
- Nycticorax caledonicus
- Nycticorax caledonicus australasiae
- Nycticorax nycticorax
- Nycticorax nycticorax hoactli
- Nycticorax nycticorax nycticorax
- Nycticryphes
- Nycticryphes semicollaris
- Nyctidromus
- Nyctidromus albicollis
- Nyctidromus anthonyi
- Nyctiphrynus
- Nyctiphrynus mcleodii
- Nyctiphrynus ocellatus
- Nyctiphrynus rosenbergi
- Nyctiphrynus yucatanicus
- Nyctipolus
- Nyctipolus hirundinaceus
- Nyctipolus nigrescens
- Nyctiprogne
- Nyctiprogne leucopyga
- Nyctiprogne vielliardi
- Nyctyornis
- Nyctyornis amictus
- Nyctyornis athertoni
- Nymphicus
- Nymphicus hollandicus
- Nystalus
- Nystalus chacuru
- Nystalus maculatus
- Nystalus obamai
- Nystalus radiatus
- Nystalus striatipectus
- Nystalus striolatus
- Nyzomela wakoloensis
- O'ahu
- O'ahu(O'ahu)
- Oahu
- Oahu Akepa
- Oahu Akialoa
- Oahu Alauahio
- Oahu Amakihi
- Oahu Elepaio
- Oahu Nukupuu
- Oahu Oo
- Oak Titmouse
- Oasis Hummingbird
- Oaxaca
- Oaxaca Hummingbird
- Oaxaca Screech-Owl
- Oaxaca Screech Owl
- Oaxaca Sparrow
- Obbia Lark
- Oberholser's Fruit-Dove
- Oberholser's Fruit Dove
- Oberlaender's Ground-Thrush
- Oberlaender's Ground Thrush
- Oberländer's Ground-Thrush
- Oberländer's Ground Thrush
- Obi
- Obi Golden-Bulbul
- Obi Golden Bulbul
- Obi Island
- Obi Island Paradise-crow
- Obi Island Paradise Crow
- Obi Paradise-crow
- Obscure Berrypecker
- Obscure Honeyeater
- Obscure Shrike-thrush
- Obscure Shrike Thrush
- Obscure Whistler
- Oceania
- Oceanic Flycatcher
- Oceanic Myiagra
- Oceanites
- Oceanites gracilis
- Oceanites maorianus
- Oceanites oceanicus
- Oceanites pincoyae
- Oceanodroma
- Oceanodroma castro
- Oceanodroma cheimomnestes
- Oceanodroma furcata
- Oceanodroma homochroa
- Oceanodroma hornbyi
- Oceanodroma jabejabe
- Oceanodroma leucorhoa


