Species - Seabirds

The Biosfera, works with these species in its monitoring, ringing and the collection of biometric data (wing, nozzle, weight and tarsus). Thanks to the partnership with the University of Coimbra, uses logger, a GPS device type for the location of these species in times of incubation and development of offspring.

 

 

Brown Booby Sula leucogaster (Boddaert, 1783)

Seabird

Global Distribution: This species can be found throughout the tropical latitudes of all oceans. In Cape Verde, as subspecies, Sula leucogaster is considered a resident species, nesting on the islands and islets of Santiago, Brava, Baluarte, Curral Velho and Raso.

Food: Its diet is mainly composed of fish, whose size varies between 5 and 40 cm in lengh.

Threat Category: Least concern.

Threats to Conservation: Historically this species has been particularly affeted by hunting and theft of eggs for colleting. In Cape Verde it is the victim of a strong human persecution and destruction of the nests in the zones where it nests.

 

 

 

Red-footed Booby Sula sula (Linnaeus, 1766)

Seabird

Global Distribution: They are found in tropical and subtropical waters all over the world (they are found in the eastern, Ethiopian, Neotropical and Australian regions and also found in oceanic islands).

Food: It feeds mainly on flying fish and squid.

Threat Category: Least concern.

Threats to Conservation: Human pressure on their habitat/nesting site, collection of cubs and eggs, and the fishing industry depletes their food source.

 

 

 

 

 

Cape Verde Shearwater Calonectris edwardsii (Oustalet, 1883)

Seabird

Global Distribution: A migratory species that reproduces exclusively on the islands and islets of Cape Verde, with Raso and Branco being the most important areas for nesting. Outside the breeding season, it mostly wintered on the south coast of Brazil and Uruguay.

Food: Their diet is composed mainly of fish of the family Clupeidae (e.g. Sardines, Sardinella maderensis) and Carangidae (e.g. Bigeye Scad, Selar crumenophthalmus) as well as squid (Loligo spp).

Threat Category: Almost threatened. 

Threats to Conservation: In Santa Luzia, It is believed that cats and rats will have been responsible for the extinction of Shearwater’s colonies. Another threat relates to bycatch mortality associated with both artisanal and industrial fisheries.

 

 

 

Bulwer´s Petrel Bulweria bulwerii (Jardine & Selby, 1828)

Seabird

Global Distribution: In Cape Verde it is considered as rare, nesting only in the Raso and the islet of Cima. Outside the breeding season, it occurs in tropical and subtropical areas around the world.

Food: Of nocturnal habits, their diet mainly comprises fish and squid, with smaller proportions of crustaceans and small pelagic insects of the genus Halobates spp.

Threat Category: Least Concern. 

Threats to Conservation: Mortality associated with bycatch, in particular by bottom longlines, of fishing activity; nesting colonies vulnerable to the predation of introduced mammals (rats, cats) or endemic species of invertebrates.

 

 

 

 

Band-Rumped Storm-Petrel jabejabe (Bocage, 1874)

Seabird

Global Distribution: It is a highly pelagic and migratory species that only comes to the land to nest, being present in the waters of Cabo Verde throughout the year, although there also appears to be some dispersion to the tropical Atlantic.

Food: It feeds mainly on planktonic crustanceans, fish and squid.

Threat Category: Least Concern. 

Threats to Conservation: Mortality associated with bycatch of fishing activity, nesting colonies vulnerable to predation of mammals (rats, cats), and mortality associated with light pollution that is especially significant around the Canary Islands.

 

 

 

 

Audubon's Shearwater Puffinus lherminieri (Lesson, 1839)

Seabird

Global Distribution: This species occurs throughout the tropics of the Indian Ocean, to the northern limit of the Arabian Sea, across the northeastern and central Pacific Ocean and the Western Atlantic Ocean. Its nesting areas include the coasts of the United Arab Emirates and the Seychelles, Galapagos, Caribbean and Bahamas.

Food: It feeds mainly on fish, squid and crustanceans.

Threat Category: Least Concern. 

Threats to Conservation: This species is vulnerable to human exploitation, (e.g. tourism), light and marine pollution, as well as mortality associated with bycatch of fishing activities and predation by introduced mammals.

 

 

 

 

 

Red-billed Tropicbird Phaethon aethereus (Linnaeus, 1758)

Seabird

Global Distribution: During breeding can be found in Ecuador, the Pacific coast of Mexico, the Caribbean Islands, south of the Atlantic and in the coastal zones of Yemen, Oman and Saudi Arabia, as well as in the following of Cape Verde islands (Santo Antão, Santiago, Sal, Boa Vista, São Vicente, Fogo, Brava, Branco and Raso's islets.

Food: It feeds mainly on small fish, especially flying fish, but also squid.

Threat Category: Least Concern. 

Threats to Conservation: In Cabo Verde, especially on the island of Boavista, this species is a victim of strong, human persecution and destruction of nests in nesting areas.