Abstract

The red-tailed hawk (Buteo jamaicensis) is a raptor species native to North America that is commonly presented to wildlife rehabilitators and veterinarians, but little is known about biomarkers of metabolic status in this species. This study evaluates plasma β-hydroxybutyrate (BHB) and free amino acids in 24 free-ranging red-tailed hawks in good body condition in order to establish reference intervals for these values. Standard biochemical analytes were also measured. The mean plasma BHB level measured was 13.9 mg/dl. Plasma amino acids were not similar to the few available reports in avian species. Standard biochemical analytes were similar to those previously reported for red-tailed hawks. These data serve as a foundation for further investigation into the use of these biomarkers to assess metabolic status of this species in health and disease.

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