From Safari Guides “Wildlife of the Galapagos”, by Julian Fitter, Daniel Fitter and David Hosking (published in 2000).
The Galapagos Islands are one of the few places in the world that remain relatively untouched by human exploitation. The preservation of the environment is everybody’s responsibility. You can help, by following some simple rules which will help to maintain the archipelago’s fragile ecosystem intact. The future depends on you.
Do not disturb or pursue any animal from its resting or nesting spot. This is especially true for birds such as boobies, cormorants, gulls and frigates. The nests should be approached carefully, keeping a distance of at least 1 to 2 metres. If disturbed, the bird will flee and abandon its egg or chick, which could be predated or die under the strong sun within 30 minutes.
All groups that visit the National Park must be accompanied by a qualified guide approved by the National Park. The visitor must follow the trails, marked with small black and white posts, and never leave it. If you do so, you may destroy nests without being conscious of it (marine iguanas nest in the sand).
Follow the guide; stay with him/her for information and advice. He or she is responsible for you. If the guide behaves badly or does not follow the rules himself, report him or her to the National Park.
Litter of all types must be kept off the islands. Disposal at sea must be limited to certain types of garbage, only to be thrown overboard in selected areas. Keep all rubbish: film wrappers, cigarette butts, chewing gum, tin cans, bottles, etc. in a bag or pocket, to be disposed of on your boat. Do not throw anything on the islands or overboard. It could end up at the coast or the beach, or eaten by sea turtles or sea lions. A sea lion may play with a tin can found on the bottom and cut its sensitive muzzle. Sea turtles may die from swallowing a plastic bag.
Do not buy souvenirs or objects made from plants or animals of the islands (with the exception of articles made from wood). Among such articles are turtle shells, sea lion teeth, black coral. This is the best way to discourage such a trade.
The Galapagos National Park thanks you for respecting these rules.