Atlantic Odyssey Pelagic Cruise

The Birdquest Atlantic Odyssey is a 24-day expedition voyage aboard MV Plancius from Ushuaia in Tierra del Fuego to Tenerife in the Canary Islands, crossing the full length of the Southern and tropical Atlantic Ocean. The route passes through the South Atlantic's most remote and ornithologically significant island groups — South Georgia, Shag Rocks, Tristan da Cunha, Ascension Island, and Cape Verde — and the open-ocean passages between them constitute one of the most comprehensive deep-water pelagic seabird experiences available anywhere in the world.

South Georgia waters are among the most seabird-rich marine ecosystems on Earth. Wandering, Black-browed, Grey-headed, and Light-mantled Albatrosses breed on Bird Island and the surrounding headlands and are encountered continuously at sea; Antarctic and Southern Giant Petrels, Wilson's Storm-Petrel, Antarctic Prion, and White-chinned Petrel accompany the vessel through the approach channels. Shag Rocks — a cluster of isolated sea stacks rising from the Scotia Sea encountered on the inbound passage — is one of the world's premier offshore seabird locations, with 40 species recorded at the dedicated eBird pelagic hotspot (L3101920) during April and May crossings; albatrosses, petrels, and prions congregate in the upwelling around the rocks in spectacular numbers.

The open-ocean passage from South Georgia southwestward toward Tristan da Cunha crosses the heart of the South Atlantic's tubenose diversity zone. Sooty and Atlantic Yellow-nosed Albatrosses join the Subantarctic species; Great-winged, Soft-plumaged, Atlantic, and Kerguelen Petrels appear over the deep water; Grey-backed and White-faced Storm-Petrels work the wave faces. Tristan da Cunha itself harbours species found essentially nowhere else: Tristan Albatross (endemic to the Tristan Group, globally endangered), Spectacled Petrel (endemic), and Atlantic Petrel — all but impossible to see outside this voyage corridor. Inaccessible Island, visible from the sea on the Tristan approach, adds Inaccessible Island Rail and Inaccessible Island Petrel to the trip list.

Northward from Tristan, the passage through the subtropical convergence and across the Inter-Tropical Convergence Zone brings an entirely different suite of species: Red-billed and White-tailed Tropicbirds, Ascension Frigatebird (seen at Ascension Island), Madeiran Storm-Petrel, and Band-rumped Storm-Petrel replace the Subantarctic birds of the south. The final run through Cape Verde waters — themselves covered in migration 0033 as a dedicated pelagic destination — provides a familiar northern Atlantic finale before landfall at Tenerife.

Birdquest has operated the Atlantic Odyssey with specialist seabird leaders since the 1990s. The April–May timing is deliberate: it coincides with the post-breeding dispersal of key South Atlantic endemics and the northward spring migration of storm-petrels that pass through the southern tropics at this season. The same route is operated by WildWings (pioneers of the voyage in 1998), Warbler Tours ("Seabird Expedition from Ushuaia to Cape Verde"), and Ornis, all aboard MV Plancius or similar expedition vessels; Far South Expeditions (Chile, migration 0049) also crosses the South Atlantic on their repositioning voyages.