Spain occupies one of the most extraordinary positions in the North Atlantic seabird world. The Iberian Peninsula forms the southwestern corner of continental Europe, and the Strait of Gibraltar — the narrow 14-kilometre passage separating it from Morocco — acts as the funnel through which virtually the entire trans-Atlantic seabird migration is concentrated each summer and autumn. Every Balearic Shearwater alive on Earth, every Great Shearwater completing its clockwise loop of the North Atlantic, every Wilson’s Storm-Petrel heading south after the northern summer passes through or near these waters. Nine hundred kilometres further south, the Canary Islands sit in the subtropical Atlantic where Macaronesian tubenoses breed on the volcanic archipelago’s outer islets and deep-water seamounts concentrate extraordinary numbers of shearwaters and storm-petrels within reach of an overnight boat.
The result is that Spain offers two of the most compelling pelagic birding experiences anywhere in Europe — experiences that address genuinely different parts of the seabird world and require entirely different trips to access them. Here’s a guide to the best pelagic birding trips in Spain, all of which are listed in our Spain directory.
Andalucía: The Gulf of Cádiz and the Strait of Gibraltar
The Gulf of Cádiz forms the Atlantic mouth of the Strait of Gibraltar, bounded by the coasts of southern Portugal, the Spanish provinces of Huelva and Cádiz, and Morocco to the south and east. Offshore, where the continental shelf drops steeply from around 100 metres to abyssal Atlantic depths, upwelling cold water concentrates fish and the seabirds that track them on their southward migration. This is the shelf break — and reaching it by boat opens access to one of the richest post-breeding seabird movements in the eastern Atlantic.
Gulf of Cádiz Pelagic
The Gulf of Cádiz Pelagic, run by Birding the Strait, departs from Chipiona harbour in Cádiz Province for a 5–6 hour voyage of approximately 25 miles round trip to the shelf edge 15–18 nautical miles offshore. Trips run from July through October, with a maximum of ten participants per departure, and chumming with up to 40 kilograms of fish oil and offal is used throughout.
The centrepiece of any Gulf of Cádiz trip is the Critically Endangered Balearic Shearwater. With a global population estimated at fewer than 20,000 birds, breeding exclusively in the Balearic Islands of the western Mediterranean, the Balearic Shearwater’s post-breeding dispersal carries the entire species out through the Strait of Gibraltar from June onwards — and the Gulf of Cádiz is consistently documented as one of the most important foraging areas during this period. Multiple hundreds, and on peak trips thousands, of Balearic Shearwaters have been recorded on single departures from Chipiona. Seeing this species in concentration anywhere is increasingly rare; seeing it in four- and five-figure numbers from a dedicated pelagic platform is possible only here.
Cory’s Shearwater — including both the nominate Atlantic Cory’s and the closely related Scopoli’s Shearwater, the two large pale-mantled shearwaters now increasingly treated as separate species — dominates the seabird spectacle numerically, with flocks of dozens to hundreds banking low over the Atlantic swells in the characteristic arcing flight of the genus. Great Shearwater, the trans-equatorial migrant from Tristan da Cunha in the South Atlantic that peaks in North Atlantic waters in July and August, is reliably encountered on productive trips. The chocolate-brown Sooty Shearwater, breeding in Tierra del Fuego and the sub-Antarctic islands and passing through in large numbers during the same window, adds depth to the shearwater suite.
The chum slick transforms storm-petrel encounters. Wilson’s Storm-Petrel, the tiny bouncing tubenose of sub-Antarctic breeding grounds present in the Gulf of Cádiz from late June to September, performs its characteristic foot-pattering feeding behaviour around the stern — individual birds at close range, with extended observation time, rather than the brief flyby that marks a land-based seawatch. European Storm-Petrel, the smallest seabird in Europe, appears alongside Wilson’s; on calm days with a productive slick, both species attend simultaneously, offering a direct comparison that is extremely difficult to achieve in any other setting.
The skua season is a particular strength of late summer and autumn. Great Skua passes through from August, approaching the vessel to investigate the chum. Pomarine Skua, Arctic Skua, and in October the elegant Long-tailed Skua complete a potential four-skua day that few European pelagic venues can match. The interaction between kleptoparasitic skuas and the attending shearwaters — twisting aerial pursuits over the chum slick — is one of the defining spectacles of a Gulf of Cádiz trip.
Sabine’s Gull, the delicate Arctic-breeding gull migrating offshore along the eastern Atlantic, is a consistent target from August through October and regularly approaches the boat. Audouin’s Gull, the Mediterranean endemic restricted to a global population of around 22,000 pairs, appears regularly from its Spanish breeding colonies and provides an interesting contrast to the ocean-going Atlantic species.
Trips run July to October; August and September are typically the most productive months for species diversity, combining peak shearwater passage with full skua and Sabine’s Gull migration.
Canary Islands: Banco de la Concepción
The Canary Islands sit in the subtropical Atlantic roughly 1,500 kilometres south of Lisbon, where Macaronesian tubenoses breed on the volcanic archipelago’s outer islets. North of Lanzarote, approximately 60–75 kilometres offshore in open Atlantic water, the submarine seamount of Banco de la Concepción rises from abyssal depths of around 2,000 metres to within 150 metres of the surface. This topography drives a permanent upwelling that concentrates seabirds in extraordinary numbers — and the proximity of the Chinijo Archipelago breeding colonies makes this a uniquely productive combination of offshore productivity and Macaronesian endemism.
Banco de la Concepción Pelagic
The Banco de la Concepción Pelagic, run by Juan Sagardía of Lanzarote Pelagics, is an overnight expedition: two 2-night, 2-day departures per season in August–September, departing from La Graciosa in the Chinijo Archipelago. Participants travel by ferry from Órzola on the northern tip of Lanzarote to La Graciosa, then sail north throughout the day to reach the seamount by late afternoon. Chumming begins as the vessel arrives and continues through the night; the second full day is spent offshore before the return south. This is not a day trip — sleeping aboard in open sea conditions is part of the experience — but the extended time at the most productive location, across the overnight window when storm-petrels are most active, produces species totals impossible from a day-return format.
The signature target is the White-faced Storm-Petrel, a pale, long-legged tubenose with a distinctive white face and dark eye-mask that uses its extraordinary legs to patter and bound across the sea surface in a kangaroo-like flight style unlike any other storm-petrel. The White-faced Storm-Petrel breeds on Montaña Clara and Alegranza in the Chinijo Archipelago — two of the islets the trip departs from — giving the expedition a direct connection to one of the only EU breeding populations. Multiple individuals are recorded on most trips in the peak July–September window; six were recorded on the September 2022 overnight trip. Outside Macaronesia, this species is genuinely difficult to see reliably in European waters.
Band-rumped Storm-Petrel — a polytypic complex now understood to encompass multiple taxa including the cool-season ‘Madeiran’ and warm-season ‘Grant’s’ forms — is numerically the most reliable storm-petrel, with counts of 30 to 40 or more on productive nights. The Chinijo Archipelago and Selvagem Islands host significant breeding populations and the Banco de la Concepción lies directly within foraging range. Wilson’s Storm-Petrel attends in smaller numbers; the tiny European Storm-Petrel, breeding on the rocky Chinijo islets, completes a potential four-storm-petrel complement on optimal evenings.
The seamount has also produced Black-bellied Storm-Petrel on multiple occasions — including the first, second, third, and fourth records for the Canary Islands, all from these Lanzarote Pelagics trips between August and October. This sub-Antarctic vagrant is the kind of deep-Atlantic rarity that surfaces only at precisely the right combination of offshore location, overnight hours, and chumming — the Banco de la Concepción is now the most reliable location in the eastern North Atlantic to search for it.
Cory’s Shearwater dominates the scene numerically, with single-trip counts regularly reaching several thousand individuals. Bulwer’s Petrel, the small all-dark tubenose breeding on the Canary Islands and Selvagens, is reliably encountered with 20 or more on a typical trip. The small, fast-flapping Barolo Shearwater (the Macaronesian form, recently split from the Atlantic and Pacific Little Shearwater complex) appears regularly. Great Shearwater, the trans-equatorial Tristan da Cunha migrant, adds rarity potential throughout.
Long-tailed Skua is reliably recorded under optimal conditions; the Banco de la Concepción lies under the primary offshore migration route and the seamount’s seabird concentration draws migrating skuas. Pomarine Skua and South Polar Skua — the powerful chocolate-brown predator from Antarctica — have both been recorded on these trips. Atlantic Spotted Dolphin, Short-beaked Common Dolphin, and Short-finned Pilot Whale frequently accompany the vessel.
Departures are limited to two per season and fill quickly. Contact Juan Sagardía well in advance of the August–September window to secure a place.
Target Species Quick Reference
Shearwaters (Gulf of Cádiz, Jul–Oct): Balearic (Critically Endangered; hundreds possible), Cory’s/Scopoli’s, Great, Sooty, Manx
Shearwaters (Canary Islands, Aug–Sep): Cory’s (thousands), Great, Barolo, Manx
Storm-petrels (Gulf of Cádiz): Wilson’s, European
Storm-petrels (Canary Islands): White-faced, Band-rumped, Wilson’s, European; Black-bellied (rare vagrant)
Petrels (Canary Islands): Bulwer’s
Skuas (Gulf of Cádiz): Great, Pomarine, Arctic, Long-tailed (Oct)
Skuas (Canary Islands): Long-tailed, Pomarine, South Polar
Gulls (Gulf of Cádiz): Sabine’s, Audouin’s
Other (Gulf of Cádiz): Northern Gannet
When to Go
Gulf of Cádiz, July–October: July and August bring the peak Balearic Shearwater concentration and the Great and Sooty Shearwater passage. September adds the full skua migration in earnest. October offers the best chance for Long-tailed Skua, Sabine’s Gull, and late migrants. The season runs exactly four months and is tied to the post-breeding dispersal window.
Canary Islands, August–September: Only two departures are available each season, timed around the seamount’s peak productivity window. Late August and early September offer the broadest overlap between Macaronesian storm-petrel activity, Great Shearwater passage, and the skua migration. Book well in advance — trips fill on reputation alone.
Planning Your Trip
Getting there: Jerez de la Frontera Airport serves Cádiz Province with connections from Madrid and several European cities. Seville Airport is the primary international hub for Andalucía. For the Canary Islands, Lanzarote Airport receives direct flights from the UK, Germany, and across northern Europe.
When to book: Gulf of Cádiz trips are announced via the Birding the Strait newsletter at the start of each season; the minimum six-participant threshold means early registration matters. Lanzarote Pelagics trips must be arranged directly with Juan Sagardía and routinely fill months in advance — contact the operator as soon as dates for the upcoming season are announced.
Seasickness: The Gulf of Cádiz is generally protected from the worst Atlantic swell, but the shelf break can be rough in southwesterly conditions. Lanzarote overnight trips involve extended offshore time in open Atlantic water and represent genuinely demanding sea conditions; standard prevention protocols (medication the night before and morning of, fresh air, horizon focus) apply strongly.
Optics: Storm-petrel and shearwater identification in Atlantic conditions rewards quality binoculars. The overnight Lanzarote format, with birds approaching the chum slick at close range after dark, is uniquely suited to observation — bring a headtorch.
Browse all pelagic and seabird trips in our Spain directory.