• 
  Small Minivet
  Bird
  
  
• 
  Smith's Longspur
  Bird
  
  
• 
  Smoke-colored Pewee
  Bird
  
  
• 
  Smoky-brown Woodpecker
  Bird
  
  
• 
  Smooth-billed Ani
  Bird
  
  
• 
  Snail Kite
  Bird
  
  
• 
  Snares Penguin
  Bird
  
  
• 
  Snow Bunting
  Bird
  
  
• 
  Snowshoe Hare
  Bird
  
  
• 
  Snowy Egret
  Bird
  
  
• 
  Snowy Owl
  Bird
  
  
• 
  Snowy Plover
  Bird
  
  
• 
  Snowy Sheathbill
  Bird
  
  
• 
  Social Flycatcher
  Bird
  
  
• 
  Solitary Sandpiper
  Bird
  
  
• 
  Solitary Tinamou
  Bird
  
  
• 
  Somali Ostrich
  Bird
  
  
• 
  Sombre Hummingbird
  Bird
  
  
• 
  Song Sparrow
  Bird
  
  
• 
  Song Thrush
  Bird
  
  
• 
  Sooty Fox Sparrow
  Bird
  
  
• 
  Sooty Grouse
  Bird
  
  
• 
  Sooty Oystercatcher
  Bird
  
  
• 
  Sooty Shearwater
  Bird
  
  
• 
  Sooty Tern
  Bird
  
  
• 
  Sooty-headed Bulbul
  Bird
  
  
• 
  Sora
  Bird
  
  
• 
  Souimanga Sunbird
  Bird
  
  
• 
  South Polar Skua
  Bird
  
  
• 
  Southern Boobook
  Bird
  
  

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40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 
60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76