Ridgway's Hawk Buteo ridgwayi

  • Order: Accipitriformes
  • Family: Accipitridae
  • Monotypic
  • Authors: David L. Anderson, Russell Thorstrom, Christine D. Hayes, and Thomas Hayes


Geographic Variation

Buteo ridgwayi is monotypic.

Related Species

Accipitridae is comprised of 247 species of hawks, eagles, and Old World vultures. Within the family there are 29 species in Buteo, the genus to which Ridgway’s Hawk belongs (Amaral et al. 2009). Buteo hawks are strong flyers capable of long migrations, and this dispersal ability is likely the key to the origin of B. ridgwayi. Ancestral state reconstruction indicates that Ridgway’s Hawk likely evolved from a migratory ancestor (Amaral et al. 2009) which, after arrival on the island of Hispaniola, evolved a nonmigratory habit. Subsequent isolation on the island allowed divergence from parental stock, a phenomenon known as "migration dosing" (Bildstein 2004). The closest continental relative is Red-shouldered Hawk (Buteo lineatus; Amaral et al. 2009).

Recommended Citation

Anderson, D. L., R. Thorstrom, C. D. Hayes, and T. Hayes (2017). Ridgway's Hawk (Buteo ridgwayi), version 1.0. In Neotropical Birds Online (T. S. Schulenberg, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/nb.ridhaw1.01