In the mid-1960s a small group of Cuban iguanas was released from a zoo on Isla Magueyes, southwest of Puerto Rico, forming an independent free-ranging feral population.[24][29] As of 2000, there has been talk of removing or relocating this population of iguanas by the US Department of Interior. This feral population is the source for 90% of the captive Cuban iguanas held in private collections and was the source for part of a study on animal communication and evolution conducted by Emilia Martins, a biologist at Indiana University.[30]