Bowden, C. G. R. 1998. The birds of Mount Kupe, Southwest Cameroon.
Cheke, R. A.; Mann, C. F.; Allen, R. 2001. Sunbirds: a guide to the sunbirds, flowerpeckers, spiderhunters and sugarbirds of the world. Christopher Helm, London.
Dowsett-Lemaire, F.; Dowsett, R. J. 1998. Zoological survey of small mammals, birds and frogs in the Bakossi and Kupe Mountains, Cameroon.
Dowsett-Lemaire, F.; Dowsett, R. J. 1999. Survey of birds and amphibians on Mt Manenguba, Mt Nlonako, north Bakossi and around Kupe in 1988-99.
Pérez del Val, J. 1996. Las aves de Bioko, Guinea Ecuatorial: guía de campo. Edilesa, Leon.
Rodewald, P. G.; Dejaifve, P. A.; Green, A. A. 1994. The birds of Korup National Park and Korup Project Area, Southwest Province, Cameroon. Bird Conservation International 4: 1-68.
Stuart, S. N. 1986. Conservation of Cameroon montane forests. International Council for Bird Preservation, Cambridge, U.K.
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Recommended citation
BirdLife International (2024) Species factsheet: Ursula's Sunbird Cinnyris ursulae. Downloaded from
https://datazone.birdlife.org/species/factsheet/ursulas-sunbird-cinnyris-ursulae on 23/11/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from
https://datazone.birdlife.org/species/search on 23/11/2024.