Francisco Piedrahita: Hartlaub's Gull (Larus hartlaubii)
Francisco Piedrahita: Cape Gull (Larus vetula)
Francisco Piedrahita: Cape Gull (Larus vetula)
Francisco Piedrahita: Gray-hooded Gull (Chroicocephalus cirrocephalus) (Chroicocephalus cirrocephalus poiocephalus)
Francisco Piedrahita: Gray-headed Gull (Larus cirrocephalus)
Francisco Piedrahita: Yellow-legged Gull (Larus michahellis)
Francisco Piedrahita: Yellow-legged Gull (Larus michahellis)
Francisco Piedrahita: Sandwich Tern (Sterna sandvicensis)
Francisco Piedrahita: Swift Tern (Sterna begii)
Francisco Piedrahita: Swift Tern (Sterna begii)