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    Academic Journals

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• Commentary: Untenables and clarifications about Accipiter migration, resurgence in urban habitats, and prey preferences in North America/Comentario: afirmaciones insostenibles y aclaraciones acerca de migracion de Accipiter, resurgencia en habitats urbanos y preferencia de presas en Norte America.

  Authors:Robert N. Rosenfield, David A. Grosshuesch, Andrew C. Stewart, William E. Stout, Timothy G. Driscoll, and John P. SeibelFrom:The Wilson Journal of Ornithology (Vol. 134, Issue 3) Peer-Reviewed

  Sept. 20224,161 words Report 1560LWe discuss select imprecise and untenable natural history information about migration, urban habitat use. and diet presented in the technical literature about Accipiter hawks in North America. We focus primarily on...

• Barriers to entrepreneurship: opportunity recognition vs. opportunity pursuit.

  Authors:Dmitry Khanin, Robert Rosenfield, Raj V. Mahto, and Cherry SinghalFrom:Review of Managerial Science (Vol. 16, Issue 4) Peer-Reviewed

  May 2022181 words Report, Brief articl...

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• Life-history trade-offs of breeding in one-year-old male Cooper's Hawks/ Soluciones de costo-beneficio de la reproduccion de individuos de un ano de edad de Accipiter cooperii

  Authors:Robert N. Rosenfield, John Bielefeldt, Travis L. Booms, Jenna A. Cava, and Michael A. BozekFrom:The Condor (Vol. 115, Issue 2) Peer-Reviewed

  May 2013526 words Author abstract, Rep...

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• Nesting biology of urban Cooper's hawks in Milwaukee, Wisconsin

  Authors:William E. Stout, Robert N. Rosenfield, William G. Holton, and John BielefeldtFrom:The Journal of Wildlife Management (Vol. 71, Issue 2) Peer-Reviewed

  Apr. 200755 words Report

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• Detection of functional ovarian hyperandrogenism in women with androgen excess

  Authors:David A. Ehrmann, Robert L. Rosenfield, Randall B. Barnes, Deborah F. Brigell, and Zubie SheikhFrom:The New England Journal of Medicine (Vol. 327, Issue 3) Peer-Reviewed

  July 16, 1992148 words Article

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• Record fledging count from a seven-egg clutch in the Cooper's Hawk (Accipiter cooperii)/Numero record de polluelos emancipados dc una puesta de siete huevos en el gavilan Accipiter cooperii.

  Authors:Robert N. Rosenfield, Sarah A. Sonsthagen, Ann Riddle-Berntsen, and Evan KuhelFrom:The Wilson Journal of Ornithology (Vol. 132, Issue 2) Peer-Reviewed

  June 20202,487 words Report 1450LCooper's Hawks (Accipiter cooperii) typically lay 3-5 eggs per clutch, rarely 6 eggs, and there are 2 accounts of 7-egg clutches and 1 record of a maximum 8-egg clutch for the species. Brood sizes of 3-5 young are common...

• Overcoming burdens in the regulation of clinical research in children. Proceedings of a consensus conference, in historical context

  Authors:Robert J. Levine, Myron Genel, Leona Cuttler, Dorothy J. Becker, Lynnette Nieman, and Robert L. RosenfieldFrom:International Journal of Pediatric Endocrinology (Vol. 2011) Peer-Reviewed

  Dec. 30, 20118,797 words Article 1630LBackground Many investigators are concerned that the modes of implementation and enforcement of the federal regulations designed to protect children are unduly impeding pediatric clinical research. Objective To...

• Comment: comparative breeding ecology of Cooper's hawks in urban vs. exurban areas of southeastern Arizona

  Authors:John Bielefeldt and Robert N. RosenfieldFrom:The Journal of Wildlife Management (Vol. 64, Issue 2) Peer-Reviewed

  Apr. 200044 words Article

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• Role of androgens in the developmental biology of the pilosebaceous unit

  Authors:Robert L. Rosenfield and Dianne DeplewskiFrom:American Journal of Medicine (Vol. 98, Issue 1A) Peer-Reviewed

  Jan. 16, 1995 Article

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• Genetic confirmation of a natural hybrid between a Northern Goshawk (Accipiter gentills) and a Cooper's Hawk (A. cooperii)

  Authors:Christy L. Haughey, Arthur Nelson, Paul Napier, Robert N. Rosenfield, Sarah A. Sonsthagen, and Sandra L. TalbotFrom:The Wilson Journal of Ornithology (Vol. 131, Issue 4) Peer-Reviewed

  Dec. 20193,301 words Report 1520LAlthough hybrids between captive Accipiter species are known, and hybrids between wild Accipiter species in North America have long been suspected, none have been confirmed to date. However, in 2014, a hatching year...

• Are There Differences in Select Ecological Attributes and Reproductive Output of Yearling Female Cooper's Hawks (Accipiter cooperii) Breeding in Urban vs. Rural Landscapes in Wisconsin?

  Authors:Robert N. Rosenfield, Madeline G. Hardin, Alexandra M. Rosenfield, and Keeley M. RosenfieldFrom:The American Midland Naturalist (Vol. 183, Issue 2) Peer-Reviewed

  Apr. 20203,323 words Article 1410LCooper's Hawks (Accipiter cooperii) nest commonly in various habitats throughout North America, but there are few comparative studies of the ecology of urban vs. rural nesting birds, especially regarding 1 v olds whose...

• Optimizing estrogen replacement treatment in Turner syndrome

  Authors:Robert L. Rosenfield, Nancy Perovic, Nancy Devine, Nelly Mauras, Tom Moshang, Allen W. Root, et al.From:Pediatrics (Vol. 102, Issue 2) Peer-Reviewed

  Aug. 19982,686 words Article Estrogen has a biphasic effect on growth, stimulatory at low doses but inhibitory at higher doses. Therefore, designing optimal sex hormone replacement treatment in girls with Turner syndrome (TS) who are being treated...

• Comparable Reproductive Success at Conifer Plantation and Non-plantation Nest Sites for Cooper's Hawks in Wisconsin

  Authors:Robert N. Rosenfield, John Bielefeldt, Sarah A. Sonsthagen, and Travis L. BoomsFrom:Wilson Bulletin (Vol. 112, Issue 3) Peer-Reviewed

  Sept. 20002,310 words Article Robert N. Rosenfield [1,4] John Bielefeldt [2] Sarah A. Sonsthagen [1] Travis L. Booms [3] ABSTRACT.--Some birds that attempt to nest in habitats such as conifer plantations may experience lower reproductive...

• Mass, reproductive biology, and nonrandom pairing in Cooper's Hawks

  Authors:Robert N. Rosenfield and John BielefeldtFrom:The Auk (Vol. 116, Issue 3) Peer-Reviewed

  July 199964 words Article

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• Genetic and morphological divergence among Cooper's Hawk (Accipiter cooperii) populations breeding in North-Central and Western North America

  Authors:Sarah A. Sonsthagen, Robert N. Rosenfield, John Bielefeldt, Robert K. Murphy, Andrew C. Stewart, William E. Stout, et al.From:The Auk (Vol. 129, Issue 3) Peer-Reviewed

  July 2012 Author abstract, Rep...

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• Hirsutism

  Author:Robert L. RosenfieldFrom:The New England Journal of Medicine (Vol. 353, Issue 24) Peer-Reviewed

  Dec. 15, 200566 words Article

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• Variation in hydrogen stable-isotope ratios between adult and nestling Cooper's Hawks

  Authors:Timothy D. Meehan, Robert N. Rosenfield, Viorel N. Atudorei, John Bielefeldt, Laura J. Rosenfield, Andrew C. Stewart, et al.From:The Condor (Vol. 105, Issue 3) Peer-Reviewed

  Aug. 2003173 words Author abstract

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• Overview of physician-hospital ventures

  Authors:Kenneth H. Cohn, Thomas R. Allyn, Robert H. Rosenfield, and Richard SchwartzFrom:The American Journal of Surgery (Vol. 189, Issue 1) Peer-Reviewed

  Jan. 2005266 words Report

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• Natal dispersal and inbreeding in the Cooper's Hawk

  Authors:Robert N. Rosenfield and John BielefeldtFrom:Wilson Bulletin (Vol. 104, Issue 1) Peer-Reviewed

  Mar. 199267 words Article

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• Are there changes in morphometries of migratory juvenile Rough-legged Hawks (Buteo lagopus) in north-central North America?/?Hay cambios en la morfometria de las aguilillas Buteo lagopus juveniles migratorios en el nor-centro de Norteamerica?

  Authors:Robert N. Rosenfield, David L. Evans, Terry P. Wiens, and Paul N. FraterFrom:The Wilson Journal of Ornithology (Vol. 134, Issue 1) Peer-Reviewed

  Mar. 20223,413 words Report 1580LGlobal rising temperatures due to recent climate change have been linked to long-term reductions in body mass and wing chord in migratory birds, including raptors. The Arctic is experiencing higher temperatures compared...