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Sherley RB, Crawford RJM, Dyer BM, Kemper J, Makhado AB, Regionally coherent trends in colonies of African Penguins
Masotla M, Pichegru L, Pistorius PA, Roux J-P, Ryan PG, Tom Spheniscus demersus in the Western Cape, South Africa,
D, Upfold L, Winker H. 2019. The status and conservation of 1987–2005. African Journal of Marine Science 28: 697–704.
Cape Gannets Morus capensis. Ostrich 90: 335–346. Williams AJ, Steele AK, Cooper J, Crawford RJM. 1990.
Underhill LG, Crawford RJM, Wolfaardt AC, Whittington PA, Dyer Distribution, population size and conservation of Hartlaub’s
BM, Leshoro TM, Ruthenberg M, Upfold L, Visagie J. 2006. Gull Larus hartlaubii. Ostrich 61: 66–76.
Cape Cormorants breeding at Dyer Island (photo BM Dyer) Cape Cormorants breeding at Ichaboe Island (photo BM Dyer)
Cape Gannets breeding at Lambert’s Bay (photo BM Dyer) Greater Crested Terns nesting at Robben Island (photo BM Dyer)
Cape Gannets breeding at Bird Island, Algoa Bay (photo BM Dyer)
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