Species Assessment: |
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The 10-year migration count trends for the Rough-legged Hawk suggest a mix of stable and declining
counts across North America with 57% of 21 total sites showing statistically significant stable counts
during this span. There have also been decreasing observations at 43% of the sites and no sites have
reported an increase. Regionally, observations are a mix of stable and declining reports with 50% of
count sites in the East Region showing declines and
50% of sites in the Central Region decreasing. The
West Region shows stable trends at the five sites
analyzed (see pie charts and trend maps below). The
20-year count trends also reflect a mix of stable and
declining counts. The East Region contains the
majority of decreasing counts for the twenty-year
period, while the West Region showed stable counts
Photo by Ilyah Sukhov
(Central Region: 1 decrease, 1 stable; East Region: 8
decrease; West Region: 2 stable). The two sites recording the highest counts of migrating Rough-
legged Hawks in the past decade, Hawk Ridge, Minnesota and Whitefish Point, Michigan counted on
average 551 and 345 per year. Hawk Ridge counts show a 7.32% decline per year for the recent
decade whereas Whitefish Point counts are stable. Derby Hill, New York, averaging 164 roughlegs
per year also shows a steep decline of 9.7% per year for the recent decade.
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D. Oleyar, D. Ethier, L. Goodrich, D. Brandes, R. Smith, J. Brown, and J. Sodergren. 2021. The Raptor Population Index: 2019 Analyses and Assessments.