Flying tortoises: Reading answers

An airborne reintroduction programme has helped conservationists take significant steps to protect the endangered Galapágos tortoise. A Forests of spiny cacti cover much of the uneven lava plains that separate the interior of the Galapágos island of Isabela from the Pacific Ocean.With its five distinct volcanoes, the island resembles a lunar landscape.Only the thick vegetation at the skirt of the often cloud-covered peak of Sierra Negra offers respite from the barren terrain below.This inhospitable environment is home to the giant Galapágos tortoise.Some time after the Galapágos's birth, around five million years ago, the islands were colonised by one or more tortoises from mainland South…