S. Seipke

Field identification of Mantled Hawk Leucopternis polionotus

S. Seipke, Douglas Kajiwara, J. L. B. Albuquerque, 2006 .

The Gray Hawk (Buteo nitidus) is Two Species

B. Millsap, W. S. Clark, S. Seipke, 2011 .

Buteo nitidus Comprende Dos Especies

B. Millsap, W. S. Clark, S. Seipke, 2011 .

Taxonomic status of Bay-winged Hawk Parabuteo (unicinctus) unicinctus and Harris's Hawk P. (u.) harrisi, with documentation of delayed plumage maturation in Bay-winged Hawk

W. S. Clark, S. Seipke, 2023, Bulletin of the British Ornithologists’ Club.

The White-collared Kite (Leptodon forbesi Swann, 1922) and a Review of the Taxonomy of the Grey-headed Kite (Leptodon cayanensis Latham, 1790)

L. F. Silveira, J. Thiollay, R. Thorstrom, 2011 .