Mediterranean gull 
Mew Gull 
Pacific Gull 
Pallass gull 
Peruvian tern 
Red-billed Gull 
Ring-billed gull 
River Tern 
Royal tern 
Sandwich tern 
Short-billed gull 
Silver gull 
Slender-billed gull 
Snowy-crowned tern 
Sooty Gull 
Sooty tern 
South American tern 
Swallow-tailed gull 
Vega Gull 
Western gull 
Whiskered tern 
White tern 
White-cheeked tern 
White-fronted tern