1. Sample the sea portion of the UTM 10x10 km squares. Both land and sea will be surveyed in those UTM 10x10 km squares with a sea portion in them. The sea survey will be conducted from the coast, without using a boat, and the effort invested in it will be proportional to the relative sea surface. It will imply roost searching but also censusing seabirds off the coast. It will generate data to depict distribution maps of these species and to estimate population sizes for some of them. Each sea survey will be assumed by the person responsible for the square.
   
   

2. Carry out seabird counts from spotting scope stations. Bird counts will be carried out by using spotting scope from 90 points evenly distributed along the entire coastline (Figure 9). All birds will be identified and counted during one hour, divided in 10 minute periods, from a fixed point previously established and without range restrictions. Every year, 1/3 (30) of the 90 points will be censused. Its selection will follow the same procedure used for the selection of squares (at random, minimizing the number of contiguous counts). Every station will be covered twice (between November 15th and December 31st and between January 1st and February 15th, as will be done for the land surveys). Counts will preferentially be conducted between 2 pm and 4 pm, the day time interval believed to provide the best light conditions along most of our coastline, and during which many species still show an optimal activity for censusing purposes. The collected data will generate abundance maps for the different species, and population estimates for those closer off the coast. As far as possible the counts will be conducted from elevated points with good views.
   
   

Due to the large effort required to cover this reduced group of species, it has been decided to deal with it exclusively by means of the extensive sampling, descarting the use of any intensive procedure. As stated under the Square sampling section, one of the one-hour censuses will be conducted in the twilight, in such a way that it will start half an hour before sunset and it will finish half an hour after it. The location of this census should be determined by the presumptive occurrence of these species in the area. Finally, these species should also be actively sought beyond the one-hour census, while condunting the supplementary surveys in the UTM 10x10 square.