There are 27 species of reptiles found on the Galapagos divided in five families as follows: snakes, geckos, Iguanas, lava lizards and, the giant tortoises.
There are around 29 types of land birds in the islands and 70% are endemic while such birds as the lava gull, swallowtail gull, Galapagos penguin and the waved albatross are actually endemic and found no where else. There are 19 main types of sea birds that proliferate the islands and many believe the birds were the first colonizing animals to populate these distant, remote lands.
The main mammals on the islands are rats, sea lions, seals and a couple of bat species as the islands have been always segregated from any Pacific main lands. Some however, are under more threat due to man importation of donkeys, dogs, black rats and goats.
It is currently reported that there are over 400 different species of fish roaming the Galapagos islands surrounding waters with 17% endemic to this area only.