Red-throated Diver Gavia stellata
winter-visitor and passage-migrant; scarce in summer.
occurs September-May; occasionally recorded June-August. Widespread along the Waterford coast. The largest
concentrations (over 100 birds on occasion) have occurred in Tramore Bay. Several inland records.
Black-throated Diver Gavia arctica
Rare, but probably annual, winter-visitor and passage-migrant.
Great Northern Diver Gavia immer
Common winter-visitor and passage-migrant, mainly October-April; occasionally
recorded in summer.
Widespread along the Waterford coast. The main concentrations have occurred
at Dungarvan Harbour, Clonea Strand and Tramore Bay. Perhaps more frequently recorded than Red-throated Diver, but the largest
concentrations have not exceeded about 40 birds.