As usual during May, when the young rooks have fledged, many family parties have moved to the coastal grasslands to feed during the day. Like choughs, rooks are also exploiting ants and other invertebrates in the numerous yellow meadow anthills along the Castlemartin coast. Skylarks, wheatears and other species also use many of these mounds as raised singing perches along the coastal plateau.
Numbers are not particularly large, but today house martins were actively nest-building at a couple of sea-cliff locations; a couple of pairs of swallows were breeding in natural sea caves and arches where this species has nested for many years; sand martins were busy at two small colonies in a couple of actively-eroding lower softer, sandy-cliff areas. Swifts were also entering nest-crevices on some of the larger limestone cliffs. Up until the 1990s, starlings also used to breed in these sea-cliffs too, but sadly none do so now.