- Source: C. nigra
C. nigra may refer to:
Animals
Cardiocondyla nigra, an ant species in the genus Cardiocondyla
Ciconia nigra, a large wading bird species
Coracopsis nigra, a black coloured parrot species native to Comoros, Madagascar, Mayotte and Seychelles
Chelonoidis niger, the largest living species of tortoise, often historically misspelled as "nigra"
Plants
Carex nigra, a perennial plant species native to wetlands of Europe and Siberia
Crataegus nigra, a hawthorn species
Centaurea nigra, a flowering plant species
See also
Nigra (disambiguation)