Birding Dublin Basin Bird Watching Dublin Dublin Basin is one of the original reservoirs that supplied water to Dublin City almost 200 years ago. It is a beautiful area for bird watching in Dublin city. Hooded MerganserDub_Basin (5)Dublin BasinMoorhenDublin BasinBlack Headed GullStarlingHerring GullTufted DuckCollared DoveFeral PigeonGrey HeronMallardHooded MerganserCootHerring GullDublin BasinMute Swans