- Ladder-tailed Nightjar
- Lake Duck
- Lappet-faced Vulture
- Lark-like Bunting
- Laughing Dove
- Laughing Falcon
- Laughing Gull
- Least Sandpiper
- Legge's Hawk-Eagle
- Lemon-browed Flycatcher
- Lemon-rumped Tanager
- Lesser Adjutant
- Lesser Antillean Bullfinch
- Lesser Antillean Saltator
- Lesser Black-backed Gull
- Lesser Crested Tern
- Lesser Flamingo
- Lesser Frigatebird
- Lesser Goldfinch
- Lesser Greenlet
- Lesser Grey Shrike
- Lesser Jacana
- Lesser Kestrel
- Lesser Kiskadee
- Lesser Masked Weaver
- Lesser Noddy
- Lesser Rhea
- Lesser Scaup
- Lesser Spotted Woodpecker
- Lesser Striped Swallow
- Lesser Swamp Warbler
- Lesser Violetear
- Lesser Whistling Duck
- Lesser Yellow-headed Vulture
- Lesser Yellowlegs
- Lesson's Motmot
- Levaillant's Cisticola
- Lilac-breasted Roller
- Limpkin
- Lineated Woodpecker
- Little Bee-eater
- Little Bittern
- Little Blue Heron
- Little Bunting
- Little Bustard
- Little Cormorant
- Little Crake
- Little Egret
- Little Grebe
- Little Gull
- Little Owl
- Little Ringed Plover
- Little Stint
- Little Swift
- Little Tern
- Lizard Buzzard
- Long-billed Hermit
- Long-crested Eagle
- Long-eared Owl
- Long-tailed Duck
- Long-tailed Fiscal
- Long-tailed Glossy Starling
- Long-tailed Jaeger
- Long-tailed Meadowlark
- Long-tailed Mockingbird
- Long-tailed Paradise Whydah
- Long-tailed Silky-flycatcher
- Long-tailed Sylph
- Long-tailed Tit
- Long-tailed Tyrant
- Long-toed Lapwing
- Loten's Sunbird
- Ludwig's Bustard