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The first White Stork Ciconia ciconia for Bioko was observed at Punta Europa on 4 February 2006; there had been a heavy thunderstorm the night before which may have blown it in from the mainland. The bird remained in the area and was last seen on 23rd, when the observer left the island.

On Bioko, three Scarce Swifts Schoutedenapus myoptilus were flying close to the coast on 10 February 2001 beside the river Ope about 4 km north of Basacato del Oeste on the western side of the island towards Luba. The only previous records from Bioko include a possible sighting from December 1996 to January 1997 and eight specimens from the period 1902 to 1933.

A three-week visit in January and February 1998 added many species to the country’s list and clarified the status of many others. Highlights included the discovery of several montane species on Monte Alen such as Grey Cuckoo-Shrike Coracina caesia, Black-capped Woodland-Warbler Phylloscopus herberti and Pink-footed Puffback Dryoscopus angolensis. Uganda Woodland-Warbler Phylloscopus budongoensis was also found to be common from 325 to 1,100 m and overlapped with Black-capped Woodland-Warbler P. herberti above 800 m. Black-throated Apalis Apalis jacksoni was found on the eastern slopes of the mountain at 750 m. Zenker’s Honeyguide Melignomon zenkeri appeared common with three sightings between 350 and 950 m. Both Verreaux’s Batis Batis minima and Bioko Batis B. poensis occur (Robert Dowsett & Françoise Dowsett-Lemaire).