title: C. nigra
text: # 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
  