- Lanner Falcon
- Lapland Longspur
- Lappet-faced Vulture
- Laughing Dove
- Laughing Gull
- Least Sandpiper
- Least Tern
- Lesser Antillean Bullfinch
- Lesser Antillean Pewee
- Lesser Antillean Saltator
- Lesser Black-backed Gull
- Lesser Crested Tern
- Lesser Flamingo
- Lesser Horned Owl
- Lesser Kestrel
- Lesser Masked Weaver
- Lesser Noddy
- Lesser Rhea
- Lesser Whitethroat
- Lilac-breasted Roller
- Little Bee-eater
- Little Bunting
- Little Bustard
- Little Egret
- Little Grebe
- Little Owl
- Little Ringed Plover
- Little Stint
- Little Tern
- Little Yellow Flycatcher
- Lizard Buzzard
- Long-eared Owl
- Long-legged Buzzard
- Long-tailed Fiscal
- Long-tailed Meadowlark
- Long-tailed Tit
- Long-toed Lapwing