根據估計,大約有5000到10000隻的加拉帕戈斯陸鬣蜥棲息於群島上[2]。在查爾斯·達爾文來到此地探險時,群島中的聖地牙哥島(Santiago Island)上還有數量相當充裕的加拉帕戈斯陸鬣蜥。當時這座島稱為「詹姆士國王島」(King James Island),達爾文的紀錄如下:「……當我們停留在島上時,我們找不到一個位置,是可以讓我們搭營,而沒有牠們的巢穴的。」[6][9][10]。不過到了今天,聖地牙哥島上的所有加拉帕戈斯陸鬣蜥族群已經完全消失,取而代之的是豬、老鼠、貓與狗[2][6]。
有一個將加拉帕戈斯陸鬣蜥重新引入巴爾特拉島(Baltra Island)的計畫。原來居住在這座島上的陸鬣蜥遭過去駐紮於此的士兵當成射擊標靶來作娛樂,因而在1954年完全滅絕[2][8]。不過在1930年代,美國報紙發行人威廉·藍道夫·赫斯特曾將這座島上的陸鬣蜥帶到幾百公尺遠的北西摩島上(而且當時北西摩島還沒有鬣蜥生存,原因不明),這些陸鬣蜥因此成為查爾斯·達爾文研究站(Charles Darwin Research Station)的保留品系,用來重新引入巴爾特拉島和其他區域[2]。
^ 3.03.1
Rassmann, Kornelia; Markmann, Melanie; Trillmich, Fritz; Tautz, Diethard, Tracing the Evolution of the Galapagos Iguanas, Iguanas: Biology and Conservation (California: University of California Press), 2004: 71–83, ISBN 9780520238541
^原文:"ugly animals, of a yellowish orange beneath, and of a brownish-red colour above: from their low facial angle they have a singularly stupid appearance."
^Darwin, Charles, The Voyage of the Beagle: Charles Darwin's Journal of Researches, New York: Penguin Classics: 401, 1989, ISBN 9780140432688
^ 8.08.18.2
Kricher, John, Galapagos: A Natural History, New Jersey: Princeton University Press: 9,51,91,200, 2006, ISBN 9780691126333
^原文:"...when we were left at James, we could not for some time find a spot free from their burrows on which to pitch our single tent"
^Darwin, Charles, Narrative of the surveying voyages of His Majesty's Ships Adventure and Beagle between the years 1826 and 1836, describing their examination of the southern shores of South America, and the Beagle's circumnavigation of the globe. Journal and remarks., London: Henry Colburn: 488, 1839
^
Knapp, Charles R.; Hudson, Richard, Translocation Strategies as a Conservation Tool for West Indian Iguanas, Iguanas: Biology and Conservation (University of California Press), 2004: 199–204, ISBN 9780520238541