HMS Beagle left Plymouth on a naval surveying mission led by Captain Robert FitzRoy, with 22-year-old Charles Darwin aboard as an unpaid naturalist. The voyage’s main purpose was to map coastlines for navigation, but Darwin’s collecting and note-taking added a major scientific dimension.
The expedition’s first landfall was at St Jago (Santiago) in the Cape Verde Islands. Here Darwin made early geological observations on volcanic landscapes, beginning a pattern of comparing landforms, rocks, and living things across different places.
The Beagle reached Bahia (Salvador da Bahia), Brazil, and Darwin experienced a tropical forest firsthand. In later writings he described this as a powerful moment for a naturalist seeing rainforest biodiversity for the first time.
After reaching Rio de Janeiro, Darwin spent months exploring nearby forests and mountains while the ship surveyed. He collected plants and animals and observed the variety of tropical life in different habitats, building skills in field observation and specimen preparation.
The Beagle arrived in Monte Video (Uruguay), which became a key base for repeated coastal surveys and inland excursions. Darwin combined natural history collecting with close study of rocks and landforms, treating geology and living nature as connected evidence.
Near Bahía Blanca in Argentina, Darwin collected large fossil bones at Punta Alta, including remains later identified as giant extinct mammals. These finds mattered because they raised questions about why some species disappear and how living animals might relate to extinct forms.
During the first visit to Tierra del Fuego, Darwin encountered Indigenous peoples and wrote detailed observations about their lives and the harsh environment. These experiences shaped his thinking about how humans adapt to different conditions, even as his interpretations reflected the biases of his era.
From Maldonado (Uruguay), Darwin made long journeys inland, not just short shore visits. Traveling by horse and on foot let him see how soils, climate, and geography affected plants and animals across a wider region than the coastal ports alone.
In 1834 the ship moved from the Atlantic side of South America to the Pacific, rounding Cape Horn after work in the far south. This transition opened a new phase of observations in Chile and Peru, where Darwin could compare Pacific coastal ecology and Andean geology with the Atlantic side.
A major earthquake struck central Chile, and Darwin investigated its effects, including damage and signs of coastal change. Seeing sudden geological forces at work supported his interest in slow and sudden processes shaping Earth over time, an important background for his later thinking about change in nature.
After months of inland expeditions and coastal surveying in the Andes and along the Pacific, the Beagle set sail from South America. This departure marked a shift from continental fieldwork to isolated oceanic islands, where species differences could be compared in a new way.
The Beagle entered Galápagos waters and Darwin explored multiple islands over several weeks. He noted that closely related animals (such as mockingbirds) differed between islands, an observation that later became important when he reconsidered how new species could form.
At Tahiti, Darwin again encountered lush tropical vegetation, but in a very different island setting from Brazil. Comparing similar climates on different landforms helped him think about how isolation and geography might shape the living world.
The Beagle arrived at Sydney, bringing Darwin into a new region with distinctive plants and animals. Australia’s unusual wildlife gave him more evidence that different parts of the world can have very different groups of related species.
At the Cocos (Keeling) Islands, Darwin studied a coral atoll—an остров-like ring of coral surrounding a lagoon. His observations supported an explanation for how atolls can form as volcanic islands slowly sink while coral grows upward, later published in his work on coral reefs.
After nearly five years at sea and on shore, the Beagle reached Falmouth, England, and Darwin left the ship. The voyage’s outcome was a vast set of specimens, field notes, and comparisons—especially from tropical forests and islands—that Darwin and other scientists would analyze for years.
HMS Beagle Naturalist Voyages and Charles Darwin's Tropical Observations (1831–1836)