This activity is linked with the Seabird and Marine Mammal Monitoring Network (RAM, in Portuguese). It's a seabird observation network initiated in the Cantabrian and Galician coasts and now extended to the whole Iberian Peninsula, including the continental Portuguese coast and the Madeira and Azores archipelagos.
One of RAM's main initiatives are the seabird observation days. During these days observers are placed along different spots of the coast, preferably at the same time, to record all birds, including items such as species, number, flight direction, age group, etc.