- Saddle-billed Stork
- Savannah Sparrow
- Scarlet Flycatcher
- Scarlet Ibis
- Scrub Euphonia
- Short-tailed Hawk
- Short-toed Snake Eagle
- Slender-billed Gull
- Snail Kite
- Snowy Egret
- Social Flycatcher
- Song Thrush
- Southern Crested Caracara
- Southern Lapwing
- Southern Pochard
- Spanish Sparrow
- Spotless Starling
- Spur-winged Lapwing
- Squacco Heron
- Swainson's Hawk
- Swallow-tailed Kite