- Lafresnaye's Piculet
- Large-footed Finch
- Laughing Falcon
- Lava Gull
- Lava Heron
- Lesser Kiskadee
- Lesser Nighthawk
- Lesser Violetear
- Lesson's Motmot
- Lettered Aracari
- Lineated Woodpecker
- Little Black Cormorant
- Little Blue Heron
- Little Egret
- Little Grebe
- Little Owl
- Little Pied Cormorant
- Little Spotted Kiwi
- Long-billed Starthroat
- Long-tailed Tit
- Long-tailed Tyrant