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

Eitemau Tebyg

• 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
  gan: Coues, Elliott, 1842-1899
  Cyhoeddwyd: (1884)
• A synopsis of the birds of North America
  gan: Audubon, John James, 1785-1851
  Cyhoeddwyd: (1839)
• Useful birds and their protection. Containing brief descriptions of the more common and useful species of Massachusetts, with accounts of their food habits, and a chapter on the means of attracting and protecting birds
  gan: Forbush, Edward Howe, 1858-1929
  Cyhoeddwyd: (1907)
• Bird-ways
  gan: Miller, Olive Thorne, 1831-1918
  Cyhoeddwyd: (1885)
• Birds at the Jurong Bird Park
  gan: Wee, Chris
  Cyhoeddwyd: (1971)