Portal de San Javier
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Since last March 17 and until the 15th of May, a team of bird banders Naturalists Association Southeast Island Grosa work permanently, compared to La Manga del Mar Menor, studying the migratory path of birds .
So far, biologists have banded ANSE and colleagues more than 1000 birds of 35 species.
The spring migration is one of the main events taking place in the lives of migratory birds.
Having survived the winter, south of the Sahara, the birds must reach their breeding grounds in time to establish a territory and finding a partner.
On this trip, they face two major ecological barriers, the Sahara Desert and the Mediterranean Sea.
The migration occurs in a broad band throughout the Mediterranean, the islands acquired a key role as stopover for many birds.
There is probably no better place to study the spring migration in the islands.
Given its geographical location, Isla Grossa has great potential for studying the spring migration in the Western Mediterranean, finding a point of abrupt change of direction of the coast at Cape Palos incurred that is open to wide areas of Mediterranean birds leave Africa to receive from sectors of the Algerian and Moroccan coast.
Grosa Island has been declared a Special Protection Area for Birds (SPAs) and recently adopted management plan.
ANSE been studying this phenomenon since 2007 and this is the fourth season of banding is performed in the spring.
In previous campaigns have captured a total of 6410 birds of 60 species.
Ringed birds have been captured in Belgium, Sweden or Norway and recently learned of a bird banded in Grosa Island was captured just 13 days later in Germany.
The banding is the application of a metal ring, usually aluminum, in the leg of a live bird.
This ring is imprinted with a return address, which identifies the station ring where the data are centralized, one or more digits characteristic ring size and a different number for all rings of the same model and season.
The results are included in the "project Piccole Isole" ringing in small Mediterranean islands, involving many different banding stations bordering countries, and aims to study the migration of European passerines.
The work performed by Grosa Island banders and others, mainly ANSE, completely voluntary, and has the approval of the General Directorate of Natural Heritage and Biodiversity in the Region of Murcia, which provides facilities and transport to the island, and with the collaboration of Mendijob Environment.
Source: ANSE
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