- Ladder-tailed Nightjar
- Lappet-faced Vulture
- Laughing Dove
- Laughing Kookaburra
- Lava Gull
- Lava Heron
- Least Sandpiper
- Lesser Crested Tern
- Lesser Rhea
- Lesser Shrike-Tyrant
- Lesser Striped Swallow
- Light-mantled Albatross
- Lilac-breasted Roller
- Little Bee-eater
- Little Corella
- Little Egret
- Little Grebe
- Little Penguin
- Little Rock Thrush
- Little Stint
- Long-crested Eagle
- Long-tailed Duck
- Long-tailed Fiscal
- Long-tailed Meadowlark