Raptor Population Index

Trend Graphs | Trend Maps | Methodology | Participating Sites | Species Assessments |


Raptors at Risk Raptors on the Rise Others

Species Assessment:
Ferruginous Hawk (Buteo regalis)

Download as PDF

The 10-year migration count trends for Ferruginous Hawks suggest stable populations across its range as the autumn count site in Goshutes, Nevada reported statistically significant stable counts during this span. Twenty-year count trends also reflect a stable population (West Region: 1 stable). Winter survey data from the Christmas Bird Count (CBC) show stable 10-year trends range-wide with the annual percent change in population reported to be an increase of 1%. The Ferruginous Hawk is a species of Least Concern, designated by IUCN red list. It has been locally designated with varying sensitivity throughout its range, which is concentrated in the Western United States, Northern Mexico, and Southwestern Canada. Ferruginous Hawks were designated nationally threatened in Canada in 2010. Since 2016, the species was listed as a Tier II or I species of greatest concern in 12 states. It is ranked by NatureServe as secure, uncommon, but not rare. Ferruginous Hawks are at high risk of population declines due to wind energy. The species has also been shown to be sensitive to urbanization, collisions with vehicles, rodenticides, and lead poisoning.

Ferruginous Hawk<br>Photo by Jesse Watson

Photo by Jesse Watson

Please cite this page as:
    D. Oleyar, D. Ethier, L. Goodrich, D. Brandes, R. Smith, J. Brown, and J. Sodergren. 2021. The Raptor Population Index: 2019 Analyses and Assessments.