Data Zone
Justification of Red List category
This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence under 20,000 km² combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population size is very large, and hence does not approach the thresholds for Vulnerable under the population size criterion (under 10,000 mature individuals with a continuing decline estimated to be over 10% in ten years or three generations, or with a specified population structure). The population trend appears to be increasing, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (over 30% decline over ten years or three generations). For these reasons the species is evaluated as Least Concern.
Population justification
The global population has been estimated at 110,000 mature individuals (Partners in Flight 2020). In North America (USA and Canada), the total population size is estimated at 110,000 mature individuals (Partners in Flight 2020). The species' population in North America (USA and Canada) is estimated to have a slightly positive annual trend, which equates to a small increase in population size over three generations (23.01 years) (Partners in Flight 2024). As this region holds the vast majority of the species' global range, the global population size is considered to be increasing slowly over three generations.
Trend justification
This species has undergone a large and statistically significant increase over the last 40 years in North America (155% increase over 40 years, equating to a 26.3% increase per decade; data from Breeding Bird Survey and/or Christmas Bird Count: Butcher and Niven 2007).
This species occurs in North America, nesting in 17 states in the USA and three provinces in Canada. It winters in the south USA and north Mexico.
An open-country species inhabiting grasslands, shrub-steppes and deserts.
Threats include cultivation, over-grazing and fire degrading habitat throughout its range, and the controlling of small mammal populations (prairie-dog towns and gopher populations) limiting food resources.
Conservation Actions Underway
CITES Appendix II. CMS Appendix II.
Text account compilers
Rutherford, C.A.
Recommended citation
BirdLife International (2024) Species factsheet: Ferruginous Hawk Buteo regalis. Downloaded from
https://datazone.birdlife.org/species/factsheet/ferruginous-hawk-buteo-regalis on 23/11/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from
https://datazone.birdlife.org/species/search on 23/11/2024.