Sternotracheal muscles, two pairs in Anseriformes, [108]

Sternum, [6], [7], [8]

Stictonetta, [111];

S. naevosa, [123]

Stictospiza, [579]

Stilt, [277], [278]

Stint, Little, [279] f., [282];

Temminck's, [280]

Stiphrornis, [514]

Stipiturus, [514], [517]