University Of Tasmania
142560-Domestic cats and their impacts on biodiversity a blind spot in the application of nature conservation law.pdf (1.01 MB)
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Domestic cats and their impacts on biodiversity: a blind spot in the application of nature conservation law

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journal contribution
posted on 2023-05-20, 20:31 authored by Trouwborst, A, Phillipa McCormackPhillipa McCormack, Martinez Camacho, E
1. Free-ranging domestic cats Felis catus, from owned pets to feral cats, impact biodiversity through predation, fear effects, competition, disease and hybridization. Scientific knowledge regarding these impacts has recently increased, making it timely to assess the role of nature conservation legislation in this connection. We do so with particular regard to the obligations of governments around the world under international wildlife law.

2. First, we provide an overview of current knowledge, based on a literature review, concerning the ways in which domestic cats impact wildlife; the resulting effects on native species’ populations and ecosystems; and available strategies for addressing these issues. In light of this knowledge, using standard legal research methodology, we then identify and interpret relevant legal instruments, with a particular focus on international wildlife treaties. Lastly, we identify and assess factors that may influence the implementation of relevant obligations.

3. The outcomes of this analysis indicate that numerous legal obligations of relevance to free-ranging domestic cats already apply under global treaties such as the Convention on Biological Diversity, Convention on Migratory Species and World Heritage Convention, and a range of regional legal instruments for biodiversity conservation. Of particular significance are obligations concerning (a) invasive alien species; (b) protected areas and (c) protected species.

4. Many national authorities around the world are currently required, under international law, to adopt and implement policies aimed at preventing, reducing or eliminating the biodiversity impacts of free-ranging domestic cats, in particular by (a) removing feral and other unowned cats from the landscape to the greatest extent possible and (b) restricting the outdoor access of owned cats.

5. Factors that can influence or impair the application of these obligations include considerations of feasibility, scientific uncertainty, the interests of cat owners and the (perceived) interests of domestic cats themselves. Even if such factors may to some extent explain why many authorities have hitherto failed to take effective action to address the threats posed by free-ranging domestic cats, from a legal perspective these factors provide little ground for justifying non-compliance with international wildlife law.


Publication title

People and Nature






Faculty of Law


John Wiley & Sons

Place of publication

United Kingdom

Rights statement

© 2020 The Authors. People and Nature published by John Wiley & Sons Ltd on behalf of British Ecological Society. This is an open access article under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) License, ( which permits use, distribution and reproduction in any medium, provided the original work is properly cited

Repository Status

  • Open

Socio-economic Objectives

Law reform