4. Southern Bald Ibis
Southern bald Ibis on a tree stump
Next on our list of the ugliest birds on Earth is the southern bald ibis (Geronticus calvus).
These ugly African birds inhabit open grasslands and semi-arid regions. They have rather ugly featherless faces with bald red heads and long curved red bills.
Their bodies are covered with glossy blue-black feathers. These birds are highly social – often found feeding and roosting in large groups.
They follow a largely insectivorous diet, feeding on a variety of caterpillars, earthworms, beetles, and grasshoppers. They may occasionally consume frogs, snails, and other invertebrates.
Pssst: The northern bald ibis (Geronticus eremita) is also very ugly!