red-tailed hawk — LLMpedia

Contents

red-tailed hawk The red-tailed hawk is a widespread North American raptor known for its broad wings, soaring flight, and distinctive tail in adults. Observers from John James Audubon to scientists at the Smithsonian Institution and curators at the American Museum of Natural History have documented its role in ecosystems from the Yukon Territory to Panama City and urban areas such as Central Park, Los Angeles, and Chicago. Field guides used by birders affiliated with the Audubon Society, Royal Ontario Museum, and the Cornell Lab of Ornithology treat it as a model species for studies in avian biology, migration, and conservation.

Taxonomy and Systematics

Described by Johann Friedrich Gmelin in the late 18th century, the species sits in the genus Buteo alongside relatives studied by researchers at the British Museum and documented in revisions by the American Ornithological Society. Molecular work from laboratories at Harvard University, Stanford University, and the University of California, Berkeley has explored relationships among subspecies such as those compared in monographs from the Linnaean Society and reports presented at the International Ornithological Congress. Historical collections at institutions like the Natural History Museum, London and the Field Museum preserve type specimens that inform debates published in journals of the Royal Society and the Proceedings of the National Academy of Sciences.

Adult birds show plumage described in plates by John James Audubon and photographs held by the National Geographic Society. Morphometrics published by researchers at the Smithsonian Institution and the University of Toronto report wing chord, tail length, and mass comparisons used by banders affiliated with Bird Banding Laboratory and the North American Bird Banding Program. Field identification features are highlighted in guides from the National Audubon Society, Roger Tory Peterson, and the Sibley Guide to Birds, with comparisons to species in the genera Accipiter and Falco noted in studies from the Royal Ontario Museum and the American Museum of Natural History. Juvenile plumages are compared in plates in works by Alexander Wilson and specimens at the Academy of Natural Sciences of Drexel University.

The species' range maps are included in atlases produced by the Cornell Lab of Ornithology and the BirdLife International assessments discussed at the IUCN meetings. Populations occur across habitats surveyed by researchers from the US Geological Survey, the Canadian Wildlife Service, and conservation NGOs such as the Nature Conservancy. Seasonal studies involving migration corridors link stopover sites like Mackenzie River Delta, the Gulf of Mexico, and the Isthmus of Tehuantepec, with ringing recoveries documented by the Canadian Migration Monitoring Network and counts by volunteers with Christmas Bird Count and Breeding Bird Survey projects.

Soaring behavior has been analyzed using telemetry from projects at Massachusetts Institute of Technology and GPS studies conducted by teams at the University of Minnesota and the Max Planck Institute for Ornithology. Territoriality and vocalizations are topics in dissertations from the University of Michigan and observational reports to the Raptor Research Foundation. Interactions with predators and competitors, including studies involving Great Horned Owl populations monitored by researchers at the University of British Columbia and Yale University, are documented in ecological journals published by the Ecological Society of America.

Nesting phenology has been recorded in long-term studies at sites monitored by the Cornell Lab of Ornithology, the Audubon Society, and university projects from Oregon State University to Texas A&M University. Clutch size, incubation, and fledging timelines are included in handbooks such as those from the Wilson Ornithological Society and breeding reports archived by the US Fish and Wildlife Service. Banding recoveries linking natal dispersal to wintering grounds are recorded in datasets curated by the Bird Banding Laboratory and analyzed in theses submitted to University of California, Davis and University of Florida.

Dietary studies initiated by ecologists at the University of Arizona and the University of Colorado Boulder show prey profiles ranging from small mammals documented in mammal surveys by the American Society of Mammalogists to birds recorded in checklists by the Royal Ontario Museum. Hunting strategies observed in urban studies at University of Illinois and rural studies at the US Department of Agriculture include perch-hunting and soaring stoops detailed in field reports to the Raptor Research Foundation and publications in the Journal of Wildlife Management.

Conservation status assessments are informed by data compiled by BirdLife International, reviewed by the IUCN Red List, and implemented in policies by the US Fish and Wildlife Service and the Canadian Wildlife Service. Human interactions are documented in urban ecology projects from Columbia University and rehabilitation case studies compiled by the International Wildlife Rehabilitation Council and regional centers like the Raptor Center at the University of Minnesota. Historical threats such as pesticide impacts detailed in reports by the Environmental Protection Agency and recovery narratives involving legal protections from the Migratory Bird Treaty Act are central to management plans by organizations including the Nature Conservancy, World Wildlife Fund, and regional chapters of the Audubon Society.