Gray Go-away-bird

The grey go-away-bird, also known as grey lourie, grey loerie, or kwêvoël, is a bold and common turaco of the southern Afrotropics. They are present in arid to moist, open woodlands and thorn savanna, especially near surface water. They regularly form groups and parties that forage in tree tops, or dust bathe on the ground. Especially when disturbed, they make their presence known by their characteristically loud and nasal "kweh" or "go-way" calls, with the last syllable typically a descending drawl. Within their range, their unique appearance and habits preclude confusion with other bird species.

Source: Wikipedia