The coastal zone of Costa del Este represents a link in the route of many migratory birds; therefore, our purpose was to determine the spatial distribution of the migratory birds in four ecological zones during a period of six months. Monthly counts were done to determine the similarities and differences in the number of sightings and richness of species. The utility and benefits that the birds get from each ecological zone was registered. Two hundred eleven thousand seven hundred ninetytwo (211,792) sightings corresponding to 20 species, six families and three orders, were registered; being Calidris mauri, Scolopacidae and Charadriiformes the best represented taxa. The diversity was low (Dmg: 1.55) and despite the outstanding dominant population of C. mauri (Ibp: 0.88), their population had decreased in 25%. There was little similarity between the zones, but the adjacent zones shared the greatest number of species. The tidal zone with 98.91% sightings, 19 species, five families and three orders was mostly used but the mud flats coastline was the main habitat which offered food and space.