- Lanner Falcon
- Lappet-faced Vulture
- Large-billed Antwren
- Large-billed Lark
- Large-billed Seed Finch
- Large-billed Tern
- Large-headed Flatbill
- Lark-like Bunting
- Laughing Dove
- Laughing Falcon
- Least Bittern
- Least Grebe
- Least Nighthawk
- Least Sandpiper
- Lemon-chested Greenlet
- Lemon Dove
- Lesser Elaenia
- Lesser Flamingo
- Lesser Grey Shrike
- Lesser Honeyguide
- Lesser Kiskadee
- Lesser Masked Weaver
- Lesser Moorhen
- Lesser Noddy
- Lesser Rhea
- Lesser Striped Swallow
- Lesser Woodcreeper
- Lesser Yellow-headed Vulture
- Lesser Yellowlegs
- Lesson's Motmot
- Levaillant's Cisticola
- Levaillant's Cuckoo
- Lilac-breasted Roller
- Lilian's Lovebird
- Limpkin
- Lineated Woodpecker
- Lined Seedeater
- Little Bee-eater
- Little Blue Heron
- Little Egret
- Little Grebe
- Little Rush Warbler
- Little Sparrowhawk
- Little Stint
- Little Swift
- Little Tern
- Little Woodpecker
- Lizard Buzzard
- Long-billed Crombec
- Long-crested Eagle
- Long-tailed Cinclodes
- Long-tailed Ground Dove
- Long-tailed Meadowlark
- Long-tailed Mockingbird
- Long-tailed Paradise Whydah
- Long-tailed Reed Finch
- Long-tailed Sylph
- Long-tailed Tyrant
- Long-winged Harrier
- Ludwig's Bustard