- Lanner Falcon
- Lappet-faced Vulture
- Large-billed Tern
- Large Grey Babbler
- Large Rock Martin
- Lark-like Bunting
- Laughing Dove
- Laughing Gull
- Laughing Kookaburra
- Lava Gull
- Lava Heron
- Lavender Waxbill
- Layard's Parakeet
- Least Sandpiper
- Legge's Flowerpecker
- Lesser Adjutant
- Lesser Black-backed Gull
- Lesser Blue-eared Starling
- Lesser Elaenia
- Lesser Flamingo
- Lesser Horned Owl
- Lesser Jacana
- Lesser Kestrel
- Lesser Kiskadee
- Lesser Masked Weaver
- Lesser Moorhen
- Lesser Rhea
- Lesser Scaup
- Lesser Spotted Eagle
- Lesser Striped Swallow
- Lesser Vasa Parrot
- Lesser Whistling Duck
- Lesser Yellow-headed Vulture
- Lesser Yellownape
- Levaillant's Cuckoo
- Lewin's Honeyeater
- Lichtenstein's Sandgrouse
- Lilac-breasted Roller
- Lilian's Lovebird
- Limpkin
- Lineated Woodpecker
- Little Auk
- Little Bee-eater
- Little Bittern
- Little Black Cormorant
- Little Blue Heron
- Little Bunting
- Little Bustard
- Little Corella
- Little Cormorant
- Little Crake
- Little Egret
- Little Grebe
- Little Greenbul
- Little Grey Woodpecker
- Little Nightjar
- Little Owl
- Little Penguin
- Little Pied Cormorant
- Little Ringed Plover
- Little Stint
- Little Swift
- Little Tern
- Little Weaver
- Livingstone's Flycatcher
- Lizard Buzzard
- Long-billed Crombec
- Long-billed Curlew
- Long-billed Dowitcher
- Long-billed Pipit
- Long-crested Eagle
- Long-eared Owl
- Long-tailed Fiscal
- Long-tailed Glossy Starling
- Long-tailed Ground Roller
- Long-tailed Jaeger
- Long-tailed Meadowlark
- Long-tailed Minivet
- Long-tailed Nightjar
- Long-tailed Paradise Whydah
- Long-tailed Tit
- Long-tailed Tyrant
- Long-toed Lapwing
- Loten's Sunbird
- Ludwig's Bustard
- Lühder's Bushshrike