- Lake Duck
- Laughing Dove
- Lazuli Bunting
- Least Sandpiper
- Lesser Antillean Bullfinch
- Lesser Antillean Saltator
- Lesser Black-backed Gull
- Lesser Goldfinch
- Lesser Noddy
- Lesser Rhea
- Lesser Spotted Woodpecker
- Lesser White-fronted Goose
- Lesser Yellowlegs
- Little Blue Heron
- Little Bustard
- Little Egret
- Little Grebe
- Little Owl
- Little Pied Cormorant
- Little Ringed Plover
- Little Stint
- Little Tern
- Livingstone's Turaco
- Long-eared Owl
- Long-legged Buzzard
- Long-tailed Duck
- Long-tailed Meadowlark
- Long-tailed Tit