Senegal lapwing 
Senegal thick-knee 
Short-billed dowitcher 
Short-billed gull 
Silver gull 
Slender-billed gull 
Small pratincole 
Snowy plover 
Snowy-crowned tern 
Solitary sandpiper 
Somali courser 
Sooty Gull 
Sooty oystercatcher 
Sooty tern 
South American tern 
South Island oystercatcher 
Southern Lapwing 
Spot-breasted lapwing 
Spotted redshank 
Spotted sandpiper 
Spotted Thick-knee 
Spur-winged lapwing 
Surfbird 
Swallow-tailed gull