• Summary
• Text account
• Data table and detailed info
• Map
• Reference and further resources

Site description (2008 baseline)
This marine area is adjacent to the terrestrial IBA PT086 and it is used by the largest colony of Cory's Shearwaters in the world, as well as by important Atlantic populations of several species of seabird such as Little Shearwater, Madeiran Storm-petrel and White-faced Storm-petrel. Other species that breed irregularly on Selvagem Pequena such as the Roseate Tern and the Black Tern also feed in this area. The Selvagens archipelago is located between Madeira Island (around 300 km north) and the Canaries (around 150 km south). It is comprised of two small uninhabited islands of volcanic origin: Selvagem Grande, with 2.5 km2 surface area, and Selvagem Pequena, 18km southwest, with just 0.16 km2. The area surrounding Selvagem Pequena is surrounded by extensive rocky shoals, many of which become exposed at low tide. The total proposed IBA is around 845 km2 partially overlapping with an existing marine reserve.

Key biodiversity
Cory's Shearwater Calonectris diomedea: The Selvagens colony, with around 30,000 pairs, is the largest colony of this species in the world. It is now increasing, after a drastic decline of its numbers caused by excessive hunting in the 1970s (Granadeiro et al. 2006). Work involving data-loggers showed that their preferred feeding areas on short trips are between Selvagem Pequena and Selvagem Grande. Little Shearwater Puffinus assimilis: Breeds mainly on Selvagem Grande, with over 4,000 pairs estimated for both islands. Its breeding seasons is from December to May, but it may be found in this IBA all year round. Bulwer's Petrel Bulweria bulwerii: A population estimated at 5,000 pairs breeds on the Selvagens, concentrated mostly on Selvagem Grande. The use of this IBA by this species should be further researched. White-faced Storm-petrel Pelagofroma marina: The population on the Selvagens is one of the largest in the Atlantic and forms the northern boundary of the species' distribution. It has large colonies on both islands and is the most abundant seabird on Selvagem Pequena. Madeiran Storm-petrel Oceanodroma castro: There are both "cold-season" and "hot-season" populations on the Selvagens. Around 1,000 breeding pairs are estimated, although more recent estimates indicate likely populations of more than 10,000 birds for the Madeira archipelago, concentrated mostly on the Desertas and Selvagens. Yellow-legged Gull Larus cachinnans: A scarce species in this IBA. Some tens of pairs may be found on these islands throughout the year. Other species observed in this IBA: Swinhoe's Storm-petrel Oceanodroma monorhis, Red-billed Tropicbird Phaethon athereus, Common Tern, Black Tern.

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Selvagens - Oceânica (Portugal). Downloaded from https://datazone.birdlife.org/site/factsheet/selvagens--oceânica-iba-portugal on 27/12/2024.