April 25, 2016

August 21, 2016

A scalloped hammerhead shark swims off Darwin’s Arch in the Galapagos. The sharks seek out ‘cleaning stations’ in the reefs and warm current around Darwin Island, where smaller fish feed off parasites on the their skin.

August 22, 2016

A Nazca booby on rat-free Wolf Island in the Galapagos, where the birds nest among thickets of cacti.

April 25, 2016

Sally lightfoot crabs live in an intertidal habitat which could be susceptible to rising sea-levels.

April 25, 2016

An iguana swims off Fernandina Island, western Galapagos, Marine iguanas are the world’s only lizards that feed in the ocean, grazing on seaweeds. In the cold Pacific waters of the western Galapagos, they can feed for only a few hours at a time, before having to bask on rocks to warm up.

April 13, 2016

Tortoises rest partially submerged in pools, near a volcanic fumarole on the crater floor of the Alcedo Volcano, on Isabela Island, Galapagos.

August 14, 2016

A vampire ground finch feeds off blood drawn by pecking at the base of feathers of a Nazca booby. The finches, thought to be a subspecies of the common sharp-beaked ground finch, evolved this distinguishing behavior to cope with shortages of its normal food of seeds and insects.

June 10, 2016

Finch specimens and seeds laid out by the photographer at the Charles Darwin Research Station, Puerto Ayora, Galapagos.

August 22, 2016

Tourists snorkel near a Galapagos sea lion, off Wolf Island, Galapagos. During warm-water El Niño events, the small fish that are the sea lions’ chief food disappear, leaving the animals weak and susceptible to disease.