- Lake Duck
- Lance-tailed Manakin
- Lappet-faced Vulture
- Laughing Dove
- Laughing Kookaburra
- Lesser Bird-of-paradise
- Lesser Flamingo
- Lesser Rhea
- Lesser Whistling Duck
- Lesser Yellow-headed Vulture
- Lilac-breasted Roller
- Lilac-crowned Amazon
- Little Bittern
- Little Bustard
- Little Egret
- Little Grebe
- Little Owl
- Little Pied Cormorant
- Little Ringed Plover
- Little Stint
- Little Tern
- Long-billed Corella
- Long-eared Owl
- Long-tailed Fiscal
- Long-tailed Tit