- Sanderling
- Sapphire-rumped Parrotlet
- Savanna Hawk
- Scaled Pigeon
- Scarlet Ibis
- Scarlet Macaw
- Scarlet Tanager
- Screaming Piha
- Semipalmated Sandpiper
- Sepia-capped Flycatcher
- Shiny Cowbird
- Short-billed Dowitcher
- Short-crested Flycatcher
- Short-tailed Hawk
- Silver-beaked Tanager
- Slender-billed Kite
- Smooth-billed Ani
- Snail Kite
- Snowy Egret
- Solitary Sandpiper
- Southern Beardless Tyrannulet
- Southern House Wren
- Southern Martin
- Southern Mouse-colored Tyrannulet
- Southern Rough-winged Swallow
- Southern White-fringed Antwren
- Spangled Cotinga
- Spectacled Thrush
- Spot-breasted Woodpecker
- Spot-tailed Antwren
- Spotted Flycatcher
- Spotted Puffbird
- Spotted Sandpiper
- Spotted Tanager
- Spotted Tody-Flycatcher
- Squirrel Cuckoo
- Straight-billed Hermit
- Straight-billed Woodcreeper
- Streaked Flycatcher
- Striated Heron
- Sulphury Flycatcher
- Summer Tanager
- Swallow-tailed Kite
- Swallow-winged Puffbird