Why go
The islands bring unusual combinations into view: penguins on equatorial coasts, reptiles feeding at sea and seabirds that have lost flight. Their differences make more sense when you connect each animal to water temperature, food and terrain. A varied itinerary offers more understanding than repeatedly seeking the same familiar species.
The full story
The Galápagos rose from the sea as volcanic islands and were never joined to a continent. Their original inhabitants arrived by flying, floating or swimming. Isolation then allowed populations to develop differences, including species found nowhere else. This is why an island name matters when identifying an animal, and why wildlife distribution is part of planning a visit. Ocean currents complicate the equatorial setting. Cold and warmer waters meet around the archipelago, helping explain the presence of penguins alongside tropical seabirds. Marine iguanas feed in the sea, while the flightless cormorant offers another striking departure from the birds familiar on a mainland coast. Vegetation also changes with height. Coastal mangroves give way to dry habitats with cactus, then transitional vegetation and humid uplands on larger islands. On Santa Cruz, comparing a coastal outing with the highlands adds a plant and habitat story to the search for giant tortoises. Ask which species and habitats your particular stops cover; no single landing represents the whole archipelago.