- Lacrimose Mountain Tanager
- Ladder-tailed Nightjar
- Lafresnaye's Piculet
- Lafresnaye's Vanga
- Lance-tailed Manakin
- Lanceolated Monklet
- Lanner Falcon
- Lappet-faced Vulture
- Large-billed Antwren
- Large-billed Crow
- Large-billed Tern
- Large-footed Finch
- Large-tailed Nightjar
- Large Rock Martin
- Large Scimitar Babbler
- Lark-like Bunting
- Laughing Dove
- Laughing Falcon
- Laughing Gull
- Lavender Waxbill
- Layard's Parakeet
- Layard's Warbler
- Lazuline Sabrewing
- Least Sandpiper
- Legge's Flowerpecker
- Lemon-rumped Tanager
- Lemon-throated Barbet
- Lesser Adjutant
- Lesser Antillean Bullfinch
- Lesser Black-backed Gull
- Lesser Crested Tern
- Lesser Flamingo
- Lesser Goldfinch
- Lesser Kiskadee
- Lesser Masked Weaver
- Lesser Moorhen
- Lesser Necklaced Laughingthrush
- Lesser Noddy
- Lesser Spotted Woodpecker
- Lesser Striped Swallow
- Lesser Violetear
- Lesser Whistling Duck
- Lesser Whitethroat
- Lesser Yellow-headed Vulture
- Lesser Yellownape
- Lesson's Motmot
- Lettered Aracari
- Levaillant's Cisticola
- Levaillant's Cuckoo
- Lilac-breasted Roller
- Lilian's Lovebird
- Limpkin
- Lineated Barbet
- Lineated Woodpecker
- Lined Antshrike
- Lined Seedeater
- Little Bee-eater
- Little Bittern
- Little Blue Heron
- Little Cormorant
- Little Egret
- Little Grebe
- Little Greenbul
- Little Grey Greenbul
- Little Gull
- Little Nightjar
- Little Ringed Plover
- Little Stint
- Little Swift
- Little Tinamou
- Little Weaver
- Little Woodpecker
- Little Yellow Flycatcher
- Lizard Buzzard
- Long-billed Crombec
- Long-crested Eagle
- Long-tailed Cisticola
- Long-tailed Fiscal
- Long-tailed Glossy Starling
- Long-tailed Ground Dove
- Long-tailed Ground Roller
- Long-tailed Manakin
- Long-tailed Nightjar
- Long-tailed Paradise Whydah
- Long-tailed Potoo
- Long-tailed Shrike
- Long-tailed Silky-flycatcher
- Long-tailed Sylph
- Long-tailed Tit
- Long-tailed Tyrant
- Long-tailed Widowbird
- Long-toed Lapwing
- Long-toed Stint
- Long-trained Nightjar
- Loten's Sunbird
- Luapula Cisticola