IUCN red list of ... 1994 t.p. (BirdLife International)
Yrbk. of intl. org., 1993/94 (Birdlife International, founded 1993)
Kenya birds, June 1993 p. 7 (On 3 March 1993, the International Council for Bird Preservation officially changed its name (for all but legal purposes) to Birdlife International)