Bennun, L. 1994. Threatened birds of Kenya, 6: Grey-crested Helmet Shrike. Kenya Birds 3(2): 84-87.
Fry, C. H.; Keith, S.; Urban, E.K. 2000. The birds of Africa vol. VI. Academic Press, London.
Malaki, P.; Muchane, M.; Balakrishna, M. 2008. Notes on the nesting and breeding behaviour of the Grey-crested Helmet-shrike Prionops poliolophus around Lake Naivasha, Kenya. Scopus 28: 41-45.
Zimmerman, D. A.; Turner, D. A.; Pearson, D. J. 1996. Birds of Kenya and northern Tanzania. Helm, London.
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Recommended citation
BirdLife International (2024) Species factsheet: Grey-crested Helmetshrike Prionops poliolophus. Downloaded from
https://datazone.birdlife.org/species/factsheet/grey-crested-helmetshrike-prionops-poliolophus on 23/12/2024.
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 23/12/2024.