452 K Srinivasan and R Kasturirangan Twine, R (2013) Animals on drugs: understanding the role of pharmaceutical companies in the animal-industrial complex Bioethical Inquiry, 10, 505–514 Warren, C R (2007) Perspectives on the ‘alien’ versus ‘native’ species debate: a critique of concepts, language and practice Progress in Human Geography, 31(4), 427–446 Warwick, H (2014) Should we cull grey squirrels to save the native red? The Guardian http://www.theguardian.com/commentisfree/2014/nov/28/cull-greysquirrels-save-native-red Accessed March 2015 WaterPatrol (2015) Alien invader threatens Britain’s native wildlife Invasive species special WaterPatrol Williams, F., Eschen, R., Harris, A., Djeddour, D., Pratt, C., Shaw, R S., et al (2010) The economic costs of invasive non-native species on Great Britain CABI Wittenberg, R., & Cock, M J W (Eds.) (2001) Invasive alien species: a toolkit of best prevention and management practices, Wallingford, Oxon: CAB International Wonham, M (2006) Species invasions 3rd edition In M J Groom, G K Meffe, & C R Carroll (Eds.), Principles of conservation biology (pp 293–331) Sunderland, MA: Sinauer Associates Inc Krithika Srinivasan is a lecturer in Human Geography at the University of Edinburgh Her research and teaching interests lie at the intersection of geographies of nature, more-than-human geographies and animal studies, and post-development politics Rajesh Kasturirangan is the co-coordinator of the Mind and Society initiative at Azim Premji University in Bangalore He’s a cognitive scientist and mathematician whose work spans mathematical models of language and perception and theories of well-being