- Sakalava Weaver
- Sanderling
- Scaly-breasted Munia
- Scarlet-rumped Tanager
- Scarlet Ibis
- Semipalmated Sandpiper
- Shiny Cowbird
- Short-eared Owl
- Siamese Pied Myna
- Slender-billed Gull
- Smooth-billed Ani
- Snowy Egret
- Social Flycatcher
- Song Sparrow
- Sooty-headed Bulbul
- Souimanga Sunbird
- Southern Mouse-colored Tyrannulet
- Speckled Pigeon
- Spectacled Thrush
- Spotted Dove
- Spotted Sandpiper
- Spruce Grouse
- Spur-winged Lapwing
- Squacco Heron
- Streak-eared Bulbul
- Striated Heron
- Stripe-throated Bulbul
- Surf Scoter