- Laughing Gull
- Least Bittern
- Least Sandpiper
- Least Tern
- Lesser Antillean Bullfinch
- Lesser Antillean Euphonia
- Lesser Antillean Flycatcher
- Lesser Antillean Pewee
- Lesser Antillean Saltator
- Lesser Black-backed Gull
- Lesser Yellowlegs
- Little Blue Heron
- Little Bustard
- Little Egret
- Little Grebe
- Little Owl
- Little Ringed Plover
- Little Stint
- Little Tern
- Long-eared Owl
- Long-winged Harrier