IUCN threat status:

Critically Endangered (CR)

Distribution

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Range Description

Oriolus isabellae is endemic to Luzon in the Philippines (Collar et al. 1999). It is known from three localities in Bataan province and five in the north-east of the island. Eleven birds were collected near San Mariano in the Sierra Madre mountains in 11 days in 1961, indicating that it may not have been particularly rare in suitable habitat. However, in the north-east it has been recorded recently at just three localities (in Quirino province and Cagayan province, and in 2003-2006 and February 2012 at Ambabok and nearby Dunoy, San Mariano municipality, Isabela province [van Weerd and Hutchinson 2004, M. van Weerd in litt. 2007, 2012]), despite an increasing number of fieldworkers attempting to locate it. There have been no observations in Bataan since 1947 and surveys in relatively undisturbed forest along the eastern coast of the Sierra Madre in 2006 failed to locate the species (M. van Weerd in litt. 2007). Since August 2012 the species has been located at five locations: Ipil (Gonzaga, Cagayan), Mansarong (Baggao, Cagayan), Ambabok, Dunoy Lake and Diwagden Creek (San Mariano, Isabela) (Acay and Realubi 2014). This indicates considerable rarity and that its distribution is probably patchy.

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© International Union for Conservation of Nature and Natural Resources

Source: IUCN

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