Saxicola torquata (Common Stonechat)
Scolopax rusticola (Eurasian Woodcock)
Serinus citrinella (Citril Finch)
Serinus serinus (European Serin)
Sitta europaea (Eurasian Nuthatch)
Sitta neumayer (Western Rock Nuthatch)
Sitta whiteheadi (Corsican Nuthatch)
Somateria mollissima (Common Eider)
Somateria spectabilis (King Eider)
Stercorarius longicaudus (Long-tailed Skua)
Stercorarius parasiticus (Arctic Skua)
Stercorarius pomarinus (Pomarine Skua)
Stercorarius skua (Great Skua)
Sterna albifrons (Little Tern)
Sterna dougallii (Roseate Tern)
Sterna paradisaea (Arctic Tern)
Sterna sandvicensis (Sandwich Tern)
Streptopelia decaocto (Collared Dove)
Streptopelia senegalensis (Laughing Dove)
Streptopelia turtur (Turtle Dove)
Strix nebulosa (Great Grey Owl)
Sturnus roseus (Rose-coloured Starling)
Sturnus unicolor (Spotless Starling)
Sylvia cantillans (Subalpine Warbler)
Sylvia communis (Common Whitethroat)
Sylvia conspicillata (Spectacled Warbler)
Sylvia curruca (Lesser Whitethroat)
Sylvia hortensis (Orphean Warbler)
Sylvia melanocephala (Sardinian Warbler)
Sylvia nisoria (Barred Warbler)
Sylvia rueppelli (Rüppell's Warbler)