Ichthyaetus
- Audouin's Gull Ichthyaetus audouinii
A gull associated with the Mediterranean, Audouin's Gull has a pale gray body and red bill as an adult and feeds mainly on fish.
- Sooty Gull Ichthyaetus hemprichii
The Sooty Gull lives along coasts around the Red Sea and Gulf of Aden. Breeding adults have dark, sooty gray-brown plumage and search the shore for fish and other food.
- Great Black-headed Gull Ichthyaetus ichthyaetus
Great Black-headed Gulls breed from the Black Sea region east to Mongolia and move south for winter. In Hong Kong, they have been recorded on an estuary mudflat during winter and passage periods.
- White-eyed Gull Ichthyaetus leucophthalmus
An adult in breeding plumage has a black hood and white crescents around the eyes, but the irises are dark brown. This gull is endemic to the Red Sea.
- Mediterranean Gull Ichthyaetus melanocephalus
The Mediterranean Gull is also recorded around the UK’s coasts and waters. Adults in breeding plumage stand out by their black heads and red bills.
- Relict Gull Ichthyaetus relictus
The Relict Gull breeds in Central and East Asia and moves to the Yellow Sea and Bohai Sea region for winter. Wintering first-year birds have been recorded on the mudflats of Deep Bay, Hong Kong.
- Great Black-headed Gull Ichthyaetus ichthyaetus
Great Black-headed Gulls breed from the Black Sea region east to Mongolia and move south for winter. In Hong Kong, they have been recorded on an estuary mudflat during winter and passage periods.
- Mediterranean Gull Ichthyaetus melanocephalus
The Mediterranean Gull is also recorded around the UK’s coasts and waters. Adults in breeding plumage stand out by their black heads and red bills.
- Audouin's Gull Ichthyaetus audouinii
A gull associated with the Mediterranean, Audouin's Gull has a pale gray body and red bill as an adult and feeds mainly on fish.
- Sooty Gull Ichthyaetus hemprichii
The Sooty Gull lives along coasts around the Red Sea and Gulf of Aden. Breeding adults have dark, sooty gray-brown plumage and search the shore for fish and other food.
- White-eyed Gull Ichthyaetus leucophthalmus
An adult in breeding plumage has a black hood and white crescents around the eyes, but the irises are dark brown. This gull is endemic to the Red Sea.
- Relict Gull Ichthyaetus relictus
The Relict Gull breeds in Central and East Asia and moves to the Yellow Sea and Bohai Sea region for winter. Wintering first-year birds have been recorded on the mudflats of Deep Bay, Hong Kong.