- Large Gray Babbler
- Large Green-Pigeon
- Large Green-billed Malkoha
- Large Green Pigeon
- Large Grey Babbler
- Large Ground-Finch
- Large Ground Finch
- Large Hawk-Cuckoo
- Large Hawk Cuckoo
- Large Lifou White-eye
- Large Lifu White-eye
- Large Monarch
- Large Mountain Scrubwren
- Large Mountain Sericornis
- Large Niltava
- Large Pied Wagtail
- Large Ponapé White-eye
- Large Racket-tailed Drongo
- Large Racquet-tailed Drongo
- Large Scimitar-Babbler
- Large Scimitar Babbler
- Large Scrubwren
- Large Tree-Finch
- Large Tree Finch
- Large Wood-Shrike
- Large Woodshrike
- Large Wren-Babbler
- Large Wren Babbler
- Large pond near Bunces Pass
- Large pond near Bunces Pass (Fort De Soto area) on highway leading to Ft. D(Tierre Verde, FL)
- Larger-spotted Nutcracker
- Larger Blue-winged Pitta
- Larger Red-headed Babbler
- Larger Red-headed Tree-Babbler
- Larger Red-headed Tree Babbler
- Largo Bay
- Laridae
- Lark
- Lark-like Brushrunner
- Lark-like Bunting
- Lark Bunting
- Lark Buttonquail
- Lark Sparrow
- Larklike Bunting
- Larosterna
- Larosterna Inca
- Larosterna inca
- Larus
- Larus Argentatus
- Larus Bulleri
- Larus Heuglini
- Larus Ridibundus
- Larus argentatus
- Larus argentatus argentatus
- Larus argentatus argenteus
- Larus argentatus mongolicus
- Larus argentatus smithsonianus
- Larus argentatus vegae
- Larus armenicus
- Larus atlanticus
- Larus atricilla
- Larus atricilla atricilla
- Larus audouinii
- Larus barabensis
- Larus belcheri
- Larus brachyrhynchus
- Larus brunnicephalus
- Larus bulleri
- Larus cachinnans
- Larus cachinnans mongolicus
- Larus californicus
- Larus canus
- Larus canus kamtschatschensis
- Larus cirrocephalus
- Larus crassirostris
- Larus delawarensis
- Larus dominicanus
- Larus dominicanus dominicanus
- Larus fuliginosus
- Larus furcatus
- Larus fuscus
- Larus fuscus barabensis
- Larus fuscus graellsii
- Larus genei
- Larus glaucescens
- Larus glaucoides
- Larus glaucoides kumlieni
- Larus glaucoides thayeri
- Larus hartlaubii
- Larus heermanni
- Larus hemprichii
- Larus heuglini
- Larus heuglini taimyrensis
- Larus hyperboreus
- Larus hyperboreus leuceretes
- Larus hyperboreus pallidissimus
- Larus ichthyaetus
- Larus leucophthalmus
- Larus livens
- Larus maculipennis
- Larus marinus
- Larus melanocephalus
- Larus michahellis
- Larus michahellis atlantis
- Larus minutus
- Larus modestus
- Larus novaehollandiae
- Larus occidentalis
- Larus pacificus
- Larus philadelphia
- Larus pipixcan
- Larus relictus
- Larus ridibundus
- Larus sabini
- Larus saundersi
- Larus schistisagus
- Larus scopulinus
- Larus scoresbii
- Larus serranus
- Larus smithsonianus
- Larus thayeri
- Larus vegae
- Larus vegae mongolicus
- Larvivora
- Larvivora akahige
- Larvivora brunnea
- Larvivora cyane
- Larvivora komadori
- Larvivora ruficeps
- Larvivora sibilans
- Las Animas
- Las Animas, CO, USA
- Las Terrazas
- Latakoo Lark
- Laterallus
- Laterallus albigularis
- Laterallus exilis
- Laterallus fasciatus
- Laterallus jamaicensis
- Laterallus leucopyrrhus
- Laterallus levraudi
- Laterallus melanophaius
- Laterallus ruber
- Laterallus spilonota
- Laterallus spilonotus
- Laterallus tuerosi
- Laterallus viridis
- Laterallus xenopterus
- Latham's Forest Francolin
- Latham's Francolin
- Latham's Myna
- Latham's Snipe
- Lathamus
- Lathamus discolor
- Lathria cryptolophus
- Lathria subalaris
- Lathrotriccus
- Lathrotriccus euleri
- Lathrotriccus euleri lawrencei
- Lathrotriccus griseipectus
- Laticilla
- Laticilla burnesii
- Laticilla cinerascens
- Latoucheornis
- Latoucheornis siemsseni
- Lattice-tailed Trogon
- Lattice tailed Trogon
- Latvia
- Laughing Dove
- Laughing Falcon
- Laughing Gull
- Laughing Kookaburra
- Laughing Owl
- Laughingthrush
- Laura's Wood-Warbler
- Laura's Woodland-Warbler
- Laura's Woodland Warbler
- Laurel Pigeon
- Lauterbach's Bowerbird
- Lauwersmeer
- Lauwersmeer Groningen province (Holland)
- Lava
- Lava Gull
- Lava Heron
- Lavender Waxbill
- Lawes's Parotia
- Lawes's Six-plumed Bird-of-paradise
- Lawes's Six-plumed Bird of paradise
- Lawes's Six-wired Bird-of-paradise
- Lawes's Six-wired Bird of paradise
- Lawrence's Goldfinch
- Lawrence's Quail-Dove
- Lawrence's Thrush
- Layard's Parakeet
- Layard's Tit-babbler
- Layard's Warbler
- Layard's White-eye
- Layard's Woodcreeper
- Laysan Albatross
- Laysan Crake
- Laysan Duck
- Laysan Finch
- Laysan Honeycreeper
- Laysan Millerbird
- Laysan Rail
- Laysan honeycreeper
- Lazio, Italy
- Lazuli Bunting
- Lazuli Kingfisher
- Lazuline Sabrewing
- Lazy Cisticola
- LeConte's Sparrow
- LeConte's Thrasher
- Le Conte's Sparrow
- Le Conte's Thrasher
- Leach's Petrel
- Leach's Storm-Petrel
- Leach's Storm-petrel
- Leach's Storm Petrel
- Leaden Antwren
- Leaden Flycatcher
- Leaden Honeyeater
- Leaden Myiagra
- Leaden Streaked Honeyeater
- Leaf-love
- Leaf Lorikeet
- Leafworker
- Lear's Macaw
- Least Auklet
- Least Bittern
- Least Boobook
- Least Flycatcher
- Least Grebe
- Least Honeyguide
- Least Nighthawk
- Least Pauraque
- Least Poorwill
- Least Pygmy-Owl
- Least Pygmy-owl
- Least Pygmy Owl
- Least Sandpiper
- Least Seedsnipe
- Least Storm-Petrel
- Least Storm Petrel
- Least Tern
- Lebanon
- Leeward Islands Reed-Warbler
- Leeward Islands Reed Warbler
- Legatus
- Legatus leucophaius
- Legge's Flowerpecker
- Legge's Hawk-Eagle
- Legge's Hawk-eagle
- Legge's Hawk Eagle
- Legge's hawk-eagle
- Leicestershire
- Leigh, Lancashire(Pennington Flash)
- Leighton Moss
- Leighton Moss RSPB(Leighton Moss, Lancashire)
- Leiopicus mahrattensis
- Leioptila
- Leioptila annectens
- Leiothlypis
- Leiothlypis celata
- Leiothlypis celata lutescens
- Leiothlypis crissalis
- Leiothlypis luciae
- Leiothlypis peregrina
- Leiothlypis ruficapilla
- Leiothlypis virginiae
- Leiothrichidae
- Leiothrix
- Leiothrix argentauris
- Leiothrix lutea
- Leiothrix lutea kwangtungensis
- Leipoa
- Leipoa ocellata
- Leistes
- Leistes bellicosus
- Leistes defilippii
- Leistes loyca
- Leistes militaris
- Leistes superciliaris
- Lemon-bellied Crombec
- Lemon-bellied Flycatcher
- Lemon-bellied Flyrobin
- Lemon-bellied White-eye
- Lemon-breasted Berrypecker
- Lemon-breasted Canary
- Lemon-breasted Flycatcher
- Lemon-breasted Seedeater
- Lemon-browed Flycatcher
- Lemon-browed Tanager
- Lemon-chested Greenlet
- Lemon-rumped Tanager
- Lemon-rumped Warbler
- Lemon-spectacled Tanager
- Lemon-throated Barbet
- Lemon-throated Leaf-Warbler
- Lemon-throated Leaf Warbler
- Lemon-throated Warbler
- Lemon-throated White-eye
- Lemon Dove
- Lemuresthes nana
- Leonardina
- Leonardina woodi
- Lepanto Jungle Flycatcher
- Lepe Cisticola
- Lepidocolaptes
- Lepidocolaptes affinis
- Lepidocolaptes albolineatus
- Lepidocolaptes angustirostris
- Lepidocolaptes duidae
- Lepidocolaptes falcinellus
- Lepidocolaptes fatimalimae
- Lepidocolaptes fuscicapillus
- Lepidocolaptes fuscus
- Lepidocolaptes lacrymiger
- Lepidocolaptes lacrymiger lafresnayi
- Lepidocolaptes layardi
- Lepidocolaptes leucogaster
- Lepidocolaptes souleyetii
- Lepidocolaptes squamatus
- Lepidogrammus
- Lepidogrammus cumingi
- Lepidopyga
- Lepidopyga coeruleogularis
- Lepidopyga goudoti
- Lepidopyga lilliae
- Lepidopygia
- Lepidopygia nana
- Lepidothrix
- Lepidothrix coeruleocapilla
- Lepidothrix coronata
- Lepidothrix iris
- Lepidothrix isidorei
- Lepidothrix nattereri
- Lepidothrix serena
- Lepidothrix suavissima
- Lepidothrix vilasboasi
- Leptasthenura
- Leptasthenura aegithaloides
- Leptasthenura aegithaloides aegithaloides
- Leptasthenura andicola
- Leptasthenura fuliginiceps


