the biri larosa protected landscape and seascape is a protected area located in northern samar, philippines, about west of catarman. it protects the balicuatro islands, composed of the island municipality of biri and associated smaller islands, off the northwestern coast of samar in the san bernardino strait. it also includes the coastal areas of the adjacent municipalities from which it derives the second half of its name – a combination of the first two letters of lavezares, rosario and san jose.