Bohernabreena Reservoir, Dublin Bohernabreena Reservoir Birds The Bohernabreena Reservoir draws its water from the Tolka River in South Dublin. There are beautiful walks around the lakes. And there is a wide variety of birdlife in the area. Bohernabreena ReservoirChaffinchLong Tailed TitPeacock ButterflyRobinRobinPied WagtailMallardWood PigeonGrey HeronLocal DeerBohernabreena ReservoirJaySpotted FlycatcherHooded CrowStagSnack Time!DipperLocal GoatLong Tailed Tit