Red-throated Diver  Gavia stellata

Common winter-visitor and passage-migrant; scarce in summer.

Mainly 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.

One 19th century record, then no confirmed records until 1978.

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.