Wada T., 1999: Number of bird species breeding in parks of Osaka City. 11 pp. 

 Walluschek-Wallfeld H., 1996: Erster Brutnachweis des Gänsesägers (Mergus merganser L.) für die Steiermark (Aves). 4 pp. 

 Watson G. E., Amerson A. B., 1967: Instructions for collecting bird parasites. 12 pp. 

 Wetmore A., 1915: A peculiarity in the growth of the tail feathers of the Giant Hornbill (Rhinoplax vigil). 4 pp. 

 Wetmore A., 1919: Bones of birds collected by Theodoor de Booy from kitchen midden deposits in the Islands of St. Thomas and St. Croix. 11 pp. 

 Wetmore A., 1919: On the anatomy of Nyctibius with notes on allied birds. 10 pp. 

 Wetmore A., 1925: Fossil birds from southeastern Arizona. 18 pp. 

 Wetmore A., 1930: A systematic classification for the birds of the world. 8 pp. 

 Wetmore A., 1932: Birds collected in Cuba and Haiti by the Parish-Smithsonian Expedition of 1930. 40 pp. 

 Wetmore A., 1936: Two new species of hawks from the Miocene of Nebraska. 6 pp. 

 Wetmore A., 1937: Observations on the birds of West Virginia. 41 pp. 

 Wetmore A., 1938: A Miocene booby and other records from the Calvert formation of Maryland. 5 pp. 

 Wetmore A., 1938: Another fossil owl from the Eocene of Wyoming. 3 pp. 

 Wetmore A., 1939: Notes on the birds of Tennessee. 69 pp. 

 Wetmore A., 1940: Notes on the birds of Kentucky. 46 pp. 

 Wetmore A., 1941: Notes on birds of the Guatemalan highlands. 59 pp. 

 Wetmore A., 1944: A collection of birds from northern Guanacaste Costa Rica. 56 pp. 

 Wetmore A., Lincoln F. C., 1933: Additional notes on the birds of Haiti and the Dominican Republic. 68 pp. 

 Witt R., 1995: Ptáci. Steinbachův velký průvodce přírodou. Poznat přírodu – přírodě porozumět. Přes 300 ptačích druhů. Přes 500 barevných fotografií. 159 pp.