Smooth-billed Ani – Swamp Sparrow Smooth-billed Ani (USA) Snail Kite Snow Bunting Snow Goose Snowy Egret Snowy Owl Snowy Plover Social Flycatcher (USA) Solitary Sandpiper Song Sparrow Sooty Grouse Sooty Shearwater Sooty Tern South Polar Skua (USA) Sora Spectacled Eider Spot-breasted Oriole Spotted Dove (USA) Spotted Owl Spotted Rail (USA) Spotted Sandpiper Spotted Towhee Sprague’s Pipit Spruce Grouse Steller’s Eider Steller’s Jay Stilt Sandpiper Sulphur-bellied Flycatcher (USA) Summer Tanager Surfbird Surf Scoter Swainson’s Hawk Swainson’s Thrush Swainson’s Warbler Swallow-tailed Kite Swamp Sparrow
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