A synopsis of the birds of North America.

Eitemau Tebyg

• Ornithological biography, or An account of the habits of the birds of the United States of America; accompanied by descriptions of the objects represented in the work entitled The birds of America, and interspersed with delineations of American scenery and manners
  gan: Audubon, John James, 1785-1851
  Cyhoeddwyd: (1839)
• A manual of the ornithology of the United States and of Canada. The land birds
  gan: Nuttall, Thomas, 1786-1859
  Cyhoeddwyd: (1832)
• Key to North American birds. Containing a concise account of every species of living and fossil bird at present known from the continent north of the Mexican and United States boundary, inclusive of Greenland and lower California
  gan: Coues, Elliott, 1842-1899
  Cyhoeddwyd: (1892)
• A manual of the ornithology of the United States and of Canada
  gan: Nuttall, Thomas, 1786-1859
  Cyhoeddwyd: (1834)
• The quadrupeds of North America
  gan: Audubon, John James, 1785-1851
  Cyhoeddwyd: (1851)