H. nigricans may refer to: Haplochromis nigricans, Boulenger, 1906, a fish species in the genus Haplochromis Heliotropium nigricans, a plant species endemic to Yemen Hexatoma nigricans, Edwards, 1927, a crane fly species in the genus Hexatoma Hirundo nigricans, the tree martin, a bird species found in Australia Hypoplectrus nigricans, a hamlet fish from the Western Atlantic Hypentelium nigricans, the northern hogsucker, a sucker fish species found in the rivers of the Mississippi basin from Oklahoma and Alabama northward to Minnesota
Synonyms Hypostomus nigricans, a synonym for Parancistrus aurantiacus, a catfish species
See also Nigricans (disambiguation)