Genetic Differentiation of the South Florida Red-Shouldered Hawk (Buteo lineatus extimus) from the Nominate Subspecies (Buteo lineatus lineatus)

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Article discusses how the south Florida subspecies of the Red-shouldered Hawk (Buteo lineatus extimus) is distinctly paler and smaller than other subspecies, reproduces at a lower rate, and can occupy very different habitats such as open marshes and grasslands with only scattered trees. The authors evaluated population differentiation between the south Florida population of Red-shouldered Hawks and two populations of eastern Red-shouldered Hawks (B. l. lineatus) in suburban (Cincinnati) and rural (Hocking Hills) environments in southern Ohio.

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Dykstra, Madeline A.; Marain, Donna M.; Wrona, Anna M.; Dysktra, Cheryl R.; Farrington, Heather L.; Johnson, Jeff A. et al. March 1, 2023.

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Article discusses how the south Florida subspecies of the Red-shouldered Hawk (Buteo lineatus extimus) is distinctly paler and smaller than other subspecies, reproduces at a lower rate, and can occupy very different habitats such as open marshes and grasslands with only scattered trees. The authors evaluated population differentiation between the south Florida population of Red-shouldered Hawks and two populations of eastern Red-shouldered Hawks (B. l. lineatus) in suburban (Cincinnati) and rural (Hocking Hills) environments in southern Ohio.

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9 p.

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Abstract: The south Florida subspecies of the Red-shouldered Hawk (Buteo lineatus extimus) is distinctly paler and smaller than other subspecies, reproduces at a lower rate, and can occupy very different habitats such as open marshes and grasslands with only scattered trees. We evaluated population differentiation between the south Florida population of Red-shouldered Hawks and two populations of eastern Red-shouldered Hawks (B. l. lineatus) in suburban (Cincinnati) and rural (Hocking Hills) environments in southern Ohio. Based on analysis of 11 microsatellite loci, we found significant genetic differentiation between the south Florida and eastern populations (FST = 0.077–0.097), as well as significant differentiation between the two populations of the eastern subspecies (FST = 0.047). Standardized genetic distance principal components analysis indicated two clusters, with individuals from the two Ohio populations forming a single cluster and those from Florida forming a second cluster. The substantial differences between the south Florida and other subspecies suggest this population warrants attention and possibly management as a distinct conservation unit, particularly in light of possible threats including habitat loss and rodenticide exposure.

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  • Journal of Raptor Research, 57(1), Raptor Research Foundation, March 1, 2023, pp. 1-9

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  • Publication Title: Journal of Raptor Research
  • Volume: 57
  • Issue: 1
  • Page Start: 52
  • Page End: 60
  • Peer Reviewed: Yes

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  • March 1, 2023

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  • Oct. 12, 2023, 2:16 p.m.

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  • Oct. 23, 2023, 10:40 a.m.

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Thumbnail image of item number 1 in: 'Genetic Differentiation of the South Florida Red-Shouldered Hawk (Buteo lineatus extimus) from the Nominate Subspecies (Buteo lineatus lineatus)'.
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Dykstra, Madeline A.; Marain, Donna M.; Wrona, Anna M.; Dysktra, Cheryl R.; Farrington, Heather L.; Johnson, Jeff A. et al. Genetic Differentiation of the South Florida Red-Shouldered Hawk (Buteo lineatus extimus) from the Nominate Subspecies (Buteo lineatus lineatus), article, March 1, 2023; (https://digital.library.unt.edu/ark:/67531/metadc2179436/: accessed April 30, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT College of Science.

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