The long heavy bill is black above and pink-based below.

All subspecies have a heavy yellow bill which gives the species its name.

There are going to be some pretty heavy bills to pay when everything gets sorted out.

It is 14-15 centimetres long and has a heavy black bill.

Most have heavy bills, which in many species are hooked at the tip.

Its long, heavy bill is black with a grey base.

It has a heavy yellow bill and a pointed black tail.

It has a deeply forked tail and a heavy black bill.

It has a heavy bill and has a short tail.

This species is a large cuckoo with a heavy bill and short wings.