| Common Name | Latin Name |
| Jabiru | Jabiru mycteria |
| Jabiru Stork | Jabiru mycteria |
| Jacdaw | Corvus monedula |
| Jack Snipe | Lymnocryptes minimus |
| Jacobin Pigeon | Columba livia jacobin |
| Jamaican Amazon | Amazona collaria |
| Jamaican Conure | Aratinga nana nana |
| Jandaya Conure | Aratinga jandaya |
| Japanese Quail | Coturnix coturnix japonica |
| Japanese Tumbler | Parus varius |
| Jardine’s Parrot | Poicephalus gulielmi gulielmi |
| Java Green Peacock | Pavo muticus |
| Java Green Peafowl | Pavo muticus muticus |
| Javan Cochoa | Cochoa azurea |
| Javan Hill Mynah | |
| Javan Hill Partridge | Arborophila javanica |
| Javan Mynah | Acridotheres javanicus javanicus |
| Javan Whistling Duck | Dendrocygna javanica |
| Jen-Cap Conure | |
| Jenday Conure | Aratinga jandaya |
| Jen-Sun Conure | Aratinga solstitialis solstitialis/jandaya |
| Jobi Island Ground Dove | Gallicolumba jobiensis |
| Jobi Lory | Lorius lory jobiensis |
| Johnstone’s Lorikeet | Trichoglossus johnstoniae |
| JosephineÕs Lory | Charmosyna josephinae |
| Jungle Nightjar | Caprimulgus indicus |
| Juniper Titmouse | Baeolophus griseus |
| Kagu | Rhynochetos jubatus |
| Kakariki | Cyanoramphus novaezelandia |
| Kauai `O`o | Moho braccatus |
| Kauai Akialoa | Hemignathus procerus |
| Kea | Nestor notabilis |
| Keel-billed Toucan | Ramphastos sulfuratus |
| Kentucky Warbler | Oporornis formosus |
| Kenya-crested Guineafowl | Guttera puchetani |
| Key West Quail-Dove | Geotrygon chrysia |
| Key West Quail-Dove | Geotrygon chrysia |
| Killdeer | Charadrius vociferus |
| King Eider | Somateria spectabilis |
| King Parrot | Alisterus |
| King Penguin | Aptenodytes patagonicus |
| King Rail | Rallus elegans |
| King Vulture | Sarcoramphus papa |
| Kirtland’s Warbler | Dendroica kirtlandii |
| Kittlitz’s Murrelet | Brachyramphus brevirostris |
| Knobbed Hornbill | Aceros cassidix |
| Knysna Touraco | Tauraco corythaix |
| Kookaburra | Dacelo novaguinae |
| Kori Bustard | Ardeotis kori |
| Kuhl’s Cape Parrot | Poicephalus robustus fuscicollis |
| La Sagra’s Flycatcher | Myiarchus sagrae |
| Labrador Duck | Camptorhynchus labradorius |
| Lace-necked Dove | Streptopelia chinensis |
| Ladder-backed Woodpecker | Picoides scalaris |
| Lady Ross’s Touraco | Musophaga violacea rossae |
| Lafresnaye’s Macaw | Ara severa castaneifrons |
| Lagger Falcon | Falco biarmicus jugger |
| Lanceolated Warbler | Locustella lanceolata |
| Lanner Falcon | Falco biarmicus biarmicus |
| Lapland Longspur | Calcarius lapponicus |
| Lapp Owl | Strix nebulosa lapponica |
| Lappet-faced Vulture | Torgos tracheliotus |
| Large Fig Parrot | Psittaculirostris desmarestii |
| large Kauai Thrush | Myadestes myadestinus |
| Large-billed Seed-Finch | Oryzoborus crassirostris |
| Large-billed Tern | Phaetusa simplex |
| Lark Bunting | Calamospiza melanocorys |
| Lark Sparrow | Chondestes grammacus |
| Laughing Gull | Larus atricilla |
| Laughing Kookaburra | Dacelo movaguimeae |
| Laughing Thrush | Garrulax |
| Lawrence’s Goldfinch | Carduelis lawrencei |
| Layard’s Parakeet | Psittacula calthropae |
| Laysan Albatross | Phoebastria immutabilis |
| Laysan Duck | Anas laysanensis |
| Laysan Finch | Telespyza cantans |
| Lazuli Bunting | Passerina amoena |
| Le Conte’s Sparrow | Ammodramus leconteii |
| Le Conte’s Thrasher | Toxostoma lecontei |
| Leach’s Storm-Petrel | Oceanodroma leucorhoa |
| Leadbeater’s Cockatoo | Cacatua leadbeateri |
| Lear’s Macaw | Anodorhynchus glaucus leari |
| Least Auklet | Aethia pusilla |
| Least Auklet | Aethia pusilla |
| least Bell’s Vireo | Vireo bellii pusillus |
| Least Bittern | Ixobrychus exilis |
| Least Flycatcher | Empidonax minimus |
| Least Grebe | Tachybaptus dominicus |
| Least Sandpiper | Calidris minutilla |
| Least Storm-Petrel | Oceanodroma microsoma |
| least Tern | Sterna antillarum |
| Least Tern | Sterna antillarum |
| Lemon Dove | Columba larvata |
| Lesser Black-backed Gull | Larus fuscus |
| Lesser Blue-eared Glossy Starling | Lamprotornis chloropterus |
| Lesser Eagle Owl | Otus gurneyi |
| Lesser Flamingo | Phoeniconaias minor |
| Lesser Frigatebird | Fregata ariel |
| Lesser Goldfinch | Carduelis psaltria |
| Lesser Jardine’s Parrot | Poicephalus gulielmi |
| Lesser Kiskadee | Philohydor licta |
| Lesser Nighthawk | Chordeiles acutipennis |
| Lesser Patagonian Conure | Cyanoliseus patagonus patagonus |
| Lesser Prairie-Chicken | Tympanuchus pallidicinctus |
| Lesser Scaup | Aythya affinis |
| Lesser Snow Goose | Anser caerulescens caerulescens |
| Lesser Sulphur Crested Cockatoo | Cacatua sulphurea sulphurea |
| Lesser Vasa Parrot | Coracopsis nigra |
| Lesser White-fronted Amazon | Amazona albifrons nana |
| Lesser White-fronted Goose | Anser erythropus |
| Lesser White-fronted Goose | Anser erythropus |
| Lesser Yellow-headed Vulture | Cathartes burrovianus |
| Lesser Yellowlegs | Tringa flavipes |
| Lewis’s Woodpecker | Melanerpes lewis |
| light-footed clapper Rail | Rallus longirostris levipes |
| Light-footed Clapper Rail | Rallus longirostris levipes |
| Lilac-breasted Roller | Coracias caudata |
| Lilac-collared Parrot | Geoffroyus simplex |
| Lilac-crowned Amazon | Amazona finschi |
| Lilacine Amazon | Amazona autumnalis lilacina |
| Lilford’s Crane | Grus grus lilfordii |
| Limpkin | Aramus guarauna |
| Lincoln’s Sparrow | Melospiza lincolnii |
| Lineolated Parakeet | Bolborhynchus lineola lineola |
| Little Blue Heron | Egretta caerulea |
| Little Bunting | Emberiza pusilla |
| Little Corella | Cacatua pastinator sanguinea |
| Little Curlew | Numenius minutus |
| Little Egret | Egretta garzetta garzetta |
| Little Egret | Egretta garzetta |
| Little Gull | Larus minutus |
| Little Owl | Athene noctua |
| Little Penguin | Eudyptula minor |
| Little Ringed Plover | Charadrius dubius |
| Little Shearwater | Puffinus assimilis |
| Little Stint | Calidris minuta |
| Little Tinamou | Crypturellus soui |
| Livingstone Touraco | Tauraco livingstonii |
| Loggerhead Kingbird | Tyrannus caudifasciatus |
| Loggerhead Shrike | Lanius ludovicianus |
| Long-billed Corella | Cacatua tenuirostris tenuirostris |
| Long-billed Curlew | Numenius americanus |
| Long-billed Dowitcher | Limnodromus scolopaceus |
| Long-billed Murrelet | Brachyramphus perdix |
| Long-billed Thrasher | Toxostoma longirostre |
| Long-crested Eagle | Lophaetus occipitalis |
| Long-eared Owl | Asio otus |
| Long-eared Owl | Asio otus |
| Long-tailed Broadbill | Psarisomus dalhousiae Psarisomus dalhousiae |
| Long-tailed Glossy Starling | Lamprotornis caudatus caudatus |
| Long-tailed Jaeger | Stercorarius longicaudus |
| Long-tailed Parakeet | Psittacula longicauda |
| Long-toed Stint | Calidris subminuta |
| Louisiana Heron | Egretta tricolor |
| Louisiana Waterthrush | Seiurus motacilla |
| Lovebird | Agapornis |
| Lucifer Hummingbird | Calothorax lucifer |
| Lucy’s Warbler | Vermivora luciae |
| Luzon Bleeding Heart Dove | Gallicolumba luzonica |
| Luzon Racquet-tail | Prioniturus platenae montanus |
