IUCN threat status:

Critically Endangered (CR)


Read full entry

Range Description

Mimus graysoni is endemic to Socorro in the Revillagigedo Islands, Mexico. It was the most abundant and widespread landbird in 1925, and was still abundant in 1958. By 1978, it had declined dramatically and was feared on the verge of extinction. Subsequent surveys have estimated the population at 50-200 pairs in 1988-1990 (Castellanos and Rodrguez-Estrella 1993, Wehtje et al. 1993, Rodrguez-Estrella et al. 1996) and c.350 individuals in 1993-1994, with the highest densities in the sheep-free dwarf forests of Cerro Evermann (Martnez-Gmez and Curry 1996). Of 170 birds ringed in 1994, 56% were subadults (Martnez-Gmez and Curry 1996), suggesting that productivity is high and the population would be capable of increasing if habitat quality improves across the island (J. E. Martnez-Gmez in litt. 2007).


Creative Commons Attribution Non Commercial Share Alike 3.0 (CC BY-NC-SA 3.0)

© International Union for Conservation of Nature and Natural Resources

Source: IUCN


EOL content is automatically assembled from many different content providers. As a result, from time to time you may find pages on EOL that are confusing.

To request an improvement, please leave a comment on the page. Thank you!