- Ixos palawanensis
- Ixos philippinus
- Ixos rufigularis
- Ixos siquijorensis
- Ixos virescens
- Ixos virescens sumatranus
- Izu Thrush
- J. N. Ding Darling National Wildlife Refuge
- Ja River Scrub-Warbler
- Ja River Scrub Warbler
- Ja River Swamp-Warbler
- Jabbering Crow
- Jabiru
- Jabiru mycteria
- Jabouilleia
- Jabouilleia danjoui
- Jabouilleia naungmungensis
- Jacamaralcyon tridactyla
- Jacamerops
- Jacamerops aureus
- Jacana
- Jacana jacana
- Jacana spinosa
- Jacanidae
- Jack Snipe
- Jackal Buzzard
- Jackass Penguin
- Jackbird
- Jackdaw
- Jackdaws
- Jackson's Francolin
- Jackson's Hornbill
- Jackson's Pipit
- Jackson's Widowbird
- Jacky-winter
- Jacky Winter
- Jacobin Cuckoo
- Jalisco
- Jamaica
- Jamaica Bay Wildlife Refuge
- Jamaican Band-tailed Pigeon
- Jamaican Becard
- Jamaican Blackbird
- Jamaican Crow
- Jamaican Elaenia
- Jamaican Euphonia
- Jamaican Lizard-Cuckoo
- Jamaican Lizard Cuckoo
- Jamaican Macaw
- Jamaican Mango
- Jamaican Mango Hummingbird
- Jamaican Oriole
- Jamaican Owl
- Jamaican Pauraque
- Jamaican Pewee
- Jamaican Poorwill
- Jamaican Spindalis
- Jamaican Stripe-headed Tanager
- Jamaican Tody
- Jamaican Vireo
- Jamaican Woodpecker
- Jamaican or Gosse's Macaw
- Jambandu Indigobird
- Jambu Fruit-Dove
- Jambu Fruit Dove
- Jambughoda Wildlife Sanctuary
- Jambuhoda Wildlife Sanctuary
- James' Flamingo
- James's Flamingo
- Jameson's Antpecker
- Jameson's Firefinch
- Jameson's Snipe
- Jameson's Wattle-eye
- Jandaya Parakeet
- Jankowski's Bunting
- Japan
- Japanese Accentor
- Japanese Bunting
- Japanese Bush-Warbler
- Japanese Bush Warbler
- Japanese Buzzard
- Japanese Cormorant
- Japanese Crow
- Japanese Gray Bunting
- Japanese Green Pigeon
- Japanese Green Woodpecker
- Japanese Grey Bunting
- Japanese Grey Thrush
- Japanese Grosbeak
- Japanese Hawfinch
- Japanese Jay
- Japanese Leaf-Warbler
- Japanese Leaf Warbler
- Japanese Murrelet
- Japanese Night-Heron
- Japanese Night Heron
- Japanese Paradise-Flycatcher
- Japanese Paradise Flycatcher
- Japanese Pygmy Woodpecker
- Japanese Quail
- Japanese Reed Bunting
- Japanese Robin
- Japanese Scops-Owl
- Japanese Scops Owl
- Japanese Skylark
- Japanese Small Starling
- Japanese Snipe
- Japanese Sparrowhawk
- Japanese Thrush
- Japanese Tit
- Japanese Wagtail
- Japanese Waxwing
- Japanese White-eye
- Japanese Wood-Pigeon
- Japanese Wood Pigeon
- Japanese Woodpecker
- Japanese Woodpigeon
- Japanese Yellow Bunting
- Jardin Botanico(Gran Canaria)
- Jardin Botanico (Gran Canaria)
- Jardine's Babbler
- Jarva Faltet
- Jarva faltet(Stockholm-Uppland)
- Jasper National Park
- Java
- Java Sparrow
- Javan Babbler
- Javan Banded-Pitta
- Javan Banded Pitta
- Javan Bush-Warbler
- Javan Bush Warbler
- Javan Cochoa
- Javan Cuckoo-Shrike
- Javan Cuckoo-shrike
- Javan Cuckooshrike
- Javan Flameback
- Javan Frogmouth
- Javan Fulvetta
- Javan Gray-throated White-eye
- Javan Green-Magpie
- Javan Green Magpie
- Javan Grey-throated White-eye
- Javan Hawk-Eagle
- Javan Hawk Eagle
- Javan Kingfisher
- Javan Lapwing
- Javan Munia
- Javan Myna
- Javan Mynah
- Javan Owlet
- Javan Plover
- Javan Pond-Heron
- Javan Pond Heron
- Javan Scops-Owl
- Javan Scops Owl
- Javan Sunbird
- Javan Tesia
- Javan Tit-Babbler
- Javan Tit Babbler
- Javan Trogon
- Javan Wattled Lapwing
- Javan Whistling Thrush
- Javan White-eye
- Javan Woodcock
- Javanese Lapwing
- Jay
- Jeffery's Sunbird
- Jelski's Black-Tyrant
- Jelski's Black Tyrant
- Jelski's Chat-Tyrant
- Jelski's Chat Tyrant
- Jerdon's Babbler
- Jerdon's Baza
- Jerdon's Bush Chat
- Jerdon's Bush Lark
- Jerdon's Bushchat
- Jerdon's Bushlark
- Jerdon's Courser
- Jerdon's Lark
- Jerdon's Leafbird
- Jerdon's Minivet
- Jerdon's Nightjar
- Jerdon's Starling
- Jersey
- Jersey Channel Islands
- Jesmond Dene
- Jesmond Dene, Armstrong Park and Heaton Park
- Jessore Sloth Bear Sanctuary
- Jet Antbird
- Jet Manakin
- Jim Corbett National Park
- Jim Corbett National Park (Uttaranchal)
- Jim Corbett national park(Uttaranchal,)
- Jobi Manucode
- Jocotoco Antpitta
- Johanna's Sunbird
- Johannes's Pygmy-Tyrant
- Johannes's Pygmy Tyrant
- Johannes's Tody-Tyrant
- Johannes's Tody Tyrant
- Johnson's Tody-Flycatcher
- Johnstone's Lorikeet
- Jokulsargljufur National Park
- Jokulsargljufur National Park Iceland
- Jones Beach State Park
- Jonjon
- Jonquil Parrot
- Jordan
- Jos Plateau Indigobird
- Josephine's Lorikeet
- Jotunheimen National Park
- Jotunheimen National Park Norway
- Jouanin's Petrel
- Joyful Greenbul
- Ju River Scrub-Warbler
- Ju River Scrub Warbler
- Ju River Swamp-Warbler
- Ju River Swamp Warbler
- Juan Fernandez Firecrown
- Juan Fernandez Petrel
- Juan Fernandez Tit-Tyrant
- Juan Fernandez Tit Tyrant
- Juan Fernández Islands
- Juba Weaver
- Jubula
- Jubula lettii
- Juliamyia
- Juliamyia julie
- Junco
- Junco bairdi
- Junco hyemalis
- Junco hyemalis cismontanus
- Junco hyemalis dorsalis
- Junco hyemalis mearnsi
- Junco hyemalis oreganus
- Junco hyemalis pinosus
- Junco insularis
- Junco phaeonotus
- Junco vulcani
- Junglaven
- Junglaven(Amazonas State)
- Jungle Babbler
- Jungle Boobook
- Jungle Bush-Quail
- Jungle Bush Quail
- Jungle Crow
- Jungle Hawk-Owl
- Jungle Hawk Owl
- Jungle Myna
- Jungle Mynah
- Jungle Nightjar
- Jungle Owlet
- Jungle Prinia
- Jungle Sparrow
- Jungle crow
- Junglefowl
- Junin Canastero
- Junin Crake
- Junin Grebe
- Junin Rail
- Junin Tapaculo
- Juniper Babbler
- Juniper Titmouse
- Jura
- Jurua Woodcreeper
- Jynx
- Jynx ruficollis
- Jynx ruficollis aequatorialis
- Jynx torquilla
- KARNALA BIRD SANCTUARY(KARNALA,Maharashtra,India)
- KZN
- Kabobo Apalis
- Kabylian Nuthatch
- Kabylie Nuthatch
- Kadavu Fantail
- Kadavu Honeyeater
- Kaempfer's Tody-Tyrant
- Kaempfer's Tody Tyrant
- Kaempfer's Woodpecker
- Kaeng Krachan National Park
- Kaeng Krachan National park(Phetchaburi)
- Kaffir Rail
- Kafiau Monarch
- Kagu
- Kai
- Kai Cicadabird
- Kai Coucal
- Kai Cuckoo-shrike
- Kai Cuckooshrike
- Kai Islands
- Kai White-eye
- Kaikoura
- Kaikoura(New Zealand South island)
- Kakadu National Park
- Kakadu National Park Australia
- Kakamega
- Kakamega Greenbul
- Kakamega poliothorax
- Kakapo
- Kakawahie
- Kakum
- Kakum National Park
- Kalahari Scrub-Robin
- Kalahari Scrub Robin
- Kalbarri National Park
- Kaleej Pheasant
- Kalij Pheasant
- Kalinowski's Chat-Tyrant
- Kalinowski's Chat Tyrant
- Kalinowski's Tinamou
- Kalkadoon Grasswren
- Kalmthoutse Heide Nature Reserve (Kalmthout Heath)
- Kalmthoutse Heide Nature Reserve (Kalmthout Heath) Belgium
- Kalochelidon euchrysea
- Kaltbrunner Riet
- Kamao
- Kamchatka Leaf-Warbler
- Kamchatka Leaf Warbler
- Kamchatka Magpie
- Kampinos National Park
- Kampinos National Park Poland
- Kampuchea
- Kamrup Sanctuary
- Kamtschatka Leaf Warbler
- Kandavu Fantail
- Kandavu Honeyeater
- Kandt's Waxbill
- Kangaroo Island Emu
- Kansas
- Kapelludden (Öland)
- Kapelludden Öland
- Kapiti
- Kapiti Island
- Karamoja Apalis
- Karavasta Lagoon
- Karavasta Lagoon Albania
- Karlso Islands Nature Reserve
- Karlso Islands Nature Reserve (Gotland)
- Karlsö Islands Nature Reserve (Gotland)
- Karnala Bird Sanctuary (Maharashtra)
- Karoo Bustard
- Karoo Chat
- Karoo Eremomela
- Karoo Korhaan
- Karoo Lark


