The data consist of measured feather concentrations of total mercury (THg) in six species of raptors sampled at Hawk Ridge, Duluth MN between 2009 and 2012. The species sampled were Sharp-shinned Hawk (Accipiter striatus), Northern Goshawk (Accipiter gentilis), Long-eared Owl (Asio otus), American Kestrel (Falco sparverius), Merlin (Falco columbarius), and Northern Harrier (Circus hudsonius).

This dataset is associated with the following publication: Keyel, E., M. Etterson, G. Niemi, D. Evers, C. DeSorbo, J. Hoffman, J. Nichols, Y. Li, and F. Nicoletti. Feather mercury increases with feeding at higher trophic levels in two species of migrant raptors, Merlin (Falco columbarius) and Sharp-shinned Hawk (Accipiter striatus). The Condor. The Cooper Ornithological Society, Bend, OR, USA, 122: 1-17, (2020).