Annecoos Wiersema

Professor; Executive Associate Dean for A; Catherine Boggs End Fac Schlr

  • Faculty


Environmental and Natural Resources Law, International Environmental Law, International Law

Professional Biography

Prof. Wiersema's research focuses on international environmental law, with particular emphasis on international wildlife law, species and biodiversity conservation, and forest conservation. Her most recent work addresses debates about markets for endangered species and the REDD+ program under the international climate change regime. In addition, she writes about the structure of the international environmental legal system, having addressed the role of conferences of the parties in international law-making. Prof. Wiersema's work breaks down the traditional division of local, national, and international perspectives and is deeply informed by theories of ecological complexity and scientific uncertainty. Prof. Wiersema is a member of the Accountability Panel for the Wildlife Justice Commission, a member of the Board of Editors for the Journal of International Wildlife Law and Policy, and a member of the IUCN's World Commission on Environmental Law.

Prof. Wiersema was Director of the International Legal Studies Program at the Sturm College of Law from 2013-2015 and held the Ved P. Nanda Chair. Prior to joining the faculty at the University of Denver Sturm College of Law, Prof. Wiersema was an Assistant Professor at The Ohio State University Michael E. Moritz College of Law and worked in the Denver office of Arnold and Porter LLP as a litigation associate. She was the George W. Foley, Jr. Fellow in Environmental Law at Harvard Law School from 1999-2000 and spent time as a Visiting Scholar at the International Monetary Fund (IMF) in 2001.


  • SJD, International and Environmental Law, Harvard Law School, 2004
  • LLB (Hons), Law, The London School of Economics, 1998
  • BA, English, University of Southampton, 1992

Licensure / Accreditations

  • Colorado Bar License

Featured Publications

Incomplete Bans and Uncertain Markets in Wildlife Trade, XII University of Pennsylvania Asian Law Review 22 (2016).
Wildlife Law (3d Edition) Foundation Press (2016).
The Precautionary Principle in Environmental Governance in Research Handbook on Fundamental Principles of Environmental Law. 26, (D. Fisher ed., Edward Elgar Publishing 2016).
Uncertainty and Markets for Endangered Species under CITES, 22 Review of European, Comparative & International Environmental Law 239-250 (2013).


Incomplete Bans and Uncertain Markets in Combating International Wildlife Crime: Enforcement, Implementation and Legal Issues. (1969).
Uncertainty, Precaution, and Adaptive Management in Wildlife Trade in Biodiversity, Sustainable Development and the Law International Symposium. (1969).
Climate Change, Deforestation, and International Law in International Law and Human Security in the 21st Century. (American Branch of the International Law Association (ABILA) 1969).