S. nigricans

S. nigricans may refer to:
 * Santiria nigricans, a plant species
 * Sayornis nigricans, the black phoebe, a bird species
 * Scambus nigricans, an ichmeunon wasp species found in the United Kingdom
 * Serpophaga nigricans, the sooty tyrannulet, a bird species
 * Siphona nigricans, Villeneuve, 1930, a fly species in the genus Siphona
 * Stegastes nigricans, a damselfish species
 * Strophius nigricans, Keyserling, 1880, a spider species in the genus Strophius and the family Thomisidae found in Trinidad, Peru, Brazil and Paraguay

Synonyms

 * Salix nigricans, a synonym for Salix myrsinifolia, a willow species native to Europe and Western Siberia