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Town: Trustees of the John Voelcker Bird Book Fund. pp. 822–823. ISBN 0-620-34053-3. del Hoyo, J.; Collar, N. (2017). "Cape White-eye (Zosterops virens)"...5 KB (518 words) - 22:42, 14 April 2024
Ryan, P. G. (2005). Roberts Birds of Southern Africa (7th ed.). Cape Town: Trustees of the John Voelcker Bird Book Fund. pp. 47–48. ISBN 0-620-34053-3....4 KB (270 words) - 00:55, 4 January 2024
Town: Trustees of the John Voelcker Bird Book Fund. pp. 991–992. ISBN 0-620-34053-3. Beolens, Bo; Watkins, Michael; Grayson, Michael (2014). The Eponym...5 KB (486 words) - 19:59, 22 December 2023
Town: Trustees of the John Voelcker Bird Book Fund. pp. 709–710. ISBN 0-620-34053-3. (Retz's helmetshrike = ) Red-billed helmetshrike Prionops retzii -...3 KB (218 words) - 20:35, 26 July 2023
Cape Town: Trustees of the John Voelcker Bird Book Fund. p. 874. ISBN 0-620-34053-3. "Calendulauda [barlowi or cavei] - Avibase". avibase.bsc-eoc.org. Retrieved...4 KB (299 words) - 02:56, 1 December 2022
Town: Trustees of the John Voelcker Bird Book Fund. pp. 823–824. ISBN 0-620-34053-3. Tarboton, Warwick (2001). A Guide to the Nests and Eggs of Southern...5 KB (501 words) - 11:02, 11 December 2022
Hockey P.A.R. et al., Roberts Birds of Southern Africa VII. 2005. ISBN 0-620-34053-3 Zimmerman D.A. et al., Birds of Kenya. 1996. ISBN 1-875091-04-1 Maclean...4 KB (457 words) - 10:48, 11 December 2023
Town: Trustees of the John Voelcker Bird Book Fund. pp. 862–863. ISBN 0-620-34053-3. S.K.B. Godschalk (1985) Feeding behaviour of avian dispersers of mistletoe...6 KB (586 words) - 09:41, 30 August 2023
Cape Town: Trustees of the John Voelcker Bird Book Fund. p. 71. ISBN 0-620-34053-3. Latham, John (1783). A General Synopsis of Birds. Vol. 2. London: Printed...8 KB (827 words) - 20:03, 23 October 2023
Town: Trustees of the John Voelcker Bird Book Fund. pp. 930–931. ISBN 0-620-34053-3. Keith, Stuart; Urban, Emil K.; Fry, C. Hilary (1992). The Birds of...5 KB (485 words) - 15:42, 21 July 2023
Town: Trustees of the John Voelcker Bird Book Fund. pp. 149–151. ISBN 0-620-34053-3. Sinclair, Ian; Ryan, Peter (2010). Birds of Africa south of the Sahara...4 KB (451 words) - 12:40, 25 October 2023
Town: Trustees of the John Voelcker Bird Book Fund. pp. 47–48. ISBN 0-620-34053-3. Maclean, Gordon L. (1990). Ornithology for Africa: a text for users...15 KB (1,270 words) - 23:20, 12 June 2023
(7th ed.). Cape Town: Trustees of the J. Voelcker Bird Book Fund. ISBN 0-620-34053-3. OCLC 65978899. Tarboton, W. R. (1998). Sasol owls & owling in Southern...10 KB (1,153 words) - 03:26, 6 December 2023
Town: Trustees of the John Voelcker Bird Book Fund. pp. 963–964. ISBN 0-620-34053-3. del Hoyo, J.; Elliott, A.; Sargatal, J.; Christie, D.A.; de Juana,...11 KB (1,044 words) - 16:36, 23 February 2024
Town: Trustees of the John Voelcker Bird Book Fund. pp. 1091–1092. ISBN 0-620-34053-3. Brisson, Mathurin Jacques (1760). Ornithologie, ou, Méthode contenant...11 KB (1,183 words) - 19:57, 14 February 2024
of Southern Africa. Trustees of the J. Voelcker Bird Book Fund. ISBN 0-620-34053-3. Christidis, Les; Boles, Walter (January 2008). Systematics and Taxonomy...24 KB (2,775 words) - 21:31, 15 May 2024
Roberts Birds of Southern Africa. John Voelcker Bird Book Fund. ISBN 978-0-620-34053-3. Spotted Eagle-Owl – Species text in The Atlas of Southern African Birds...12 KB (1,543 words) - 11:20, 28 February 2024
of southern Africa. Trustees of the John Voelcker bird book fund. ISBN 0620340533. Barnard, P. (1986). "Windhovering patterns of three African raptors in...6 KB (659 words) - 10:28, 11 September 2022
Cape Town: Trustees of the John Voelcker Bird Book Fund. p. 278. ISBN 0620340533. Downs, Colleen T (April 2006). "Geophagy in the African Olive Pigeon...7 KB (782 words) - 01:41, 22 February 2024
Trustees of the John Voelcker Bird Book Fund. pp. 1084–1086. ISBN 978-0-620-34053-3. Friedmann 1950, p. 306 Summers-Smith 1988, p. 77 Summers-Smith 1988...25 KB (3,144 words) - 17:54, 2 May 2024
