Take a panga (Zodiac boat) to Caleta Tortuga Negra (Black Turtle Cove) – a red mangrove wetland on the north shore of Isla Santa Cruz. Jump in the cove’s peaceful waters to see green turtles – this cove is also a nursery for golden cow-nose rays, eagle rays and Galapagos sharks! There’s also abundant birdlife here, like the yellow warbler and lava heron. This is also a breeding area for turtles, so it’s not uncommon to see them mating. In the afternoon, cruise over for a walk on Cerro Dragon (Dragon Hill) – one of the best places to see land iguanas. Walk to a brackish lagoon, spotting lagoon birds like stilts, pintail ducks, sandpipers, sanderlings and flamingos along the way. Further inland, the trail offers a view of the bay and the western area of the archipelago, which is a nesting site for land iguanas, constantly monitored by the Charles Darwin Research Station. The arid-zone vegetation makes for an ideal place to see Darwin's finches, Galapagos mockingbirds, the endemic Galapagos flycatcher and yellow warblers.