A female (dark phase) and male Crested Eagle (Morphnus guinanensis) at
their nest in the rainforest north of Manaus, Amazonas, Brazil.
Birds of prey have always fascinated me, and much of my life has been spent studying them or training and hunting with them in falconry. My research on raptors began with Ospreys and Harriers on Marthas Vineyard and continued on the high plains of Montana with studies of the raptors that were the subject of my doctoral dissertation, Morphological analyses of community structure in diurnal birds of prey.
In Brazil, raptors reluctantly were relegated to occasional studies, as my main work was with small, understory (prey) species. Upon my return to the states, I undertook a major literature review in the course of writing the species accounts for 81 species of Falconiformes found in Mexico and Central and South America for Volume II of the Handbook of Birds of the World.
Currently, my major focus is on satellite tracking Osprey migration and Barred Owls living in the Charlotte suburbs and surrounding region.
Publications on Birds of PreyBierregaard, R. O., Jr. 1984. Observations on the nesting biology of the Guiana Crested Eagle (Morphnus guianensis). Wilson Bull. 96(1):1-5.
Klein, B. C. and R. O. Bierregaard, Jr. 1988. Capture and telemetry techniques for the Lined Forest Falcon, Micrastur gilvicollis. Raptor Research 22: 29.
Klein, B. C. and R. O. Bierregaard, Jr. 1988. Movement and calling behavior of the Lined Forest-falcon (Micrastur gilvicollis) in the Brazilian Amazon. Condor 90: 497-499.
Klein, B. C., L. H. Harper, R. O. Bierregaard, Jr., and G. V. N. Powell. 1988. Nesting and feeding behavior of the Ornate Hawk-eagle, Spizaetus ornatus. Condor 90:239-241.
Bierregaard, R. O., Jr. 1994. Species accounts of 81 species of Central and South American Falconiformes. In J. del Hoyo, A. Elliot, and J. Sargatal, editors. Handbook of Birds of the World, Vol. II. Lynx Edicions, Barcelona, Spain.
Bierregaard, R. O., Jr. 1995. The biology and conservation status of Central and South American Falconiformes: a survey of current knowledge. Bird Conservation International 5:329-345.
Bierregaard, R. O., Jr. 1995. The status of raptor conservation and our knowledge of the resident diurnal birds of prey of Mexico. Pp 203-213. Trans. 61st North American Wildlife and Natural Resources Conference. Wildlife Management Institute, Washington, DC.
Bierregaard, R. O., Jr. 1998. The conservation status of birds of prey in the South American tropics. J. Raptor Research 32: 19-27.