Why is the pinta island tortoise endangered?

It is a species of Giant tortoise. There is only one known Pinta tortoise left in exsistense, he is known as 'lonley george', he weighs approximately 90 kilograms and measures over 100 centimeters across his carapace. His exact age is unknown, but is predicted to be between 60 and 90 years. When "Lonesome George" eventually dies, his species will probably end with him. He will join the other species of giant tortoises that have become extinct in Galapagos.

Poor lonesome George...