外來物種
The islands' biodiversity is under threat from several sources. The human population is growing at an unsustainable rate of 8% per year (1995). Introduced species have caused damage, and in 1996 a US$5 million, five-year eradication plan commenced in an attempt to rid the islands of introduced species such as goats, rats, deer, and donkeys. Except for the rats, the project was essentially completed in 2006. Rats have only been eliminated from the smaller Galápagos Islands of Rábida and Pinzón.