it sounds like a monkey
A howl can sound like something like "Aroo"... It starts like a grumble in the throat, then it begins at a low "arr", then a more high pitch with the "oo". Finally it goes back down to a low sound "ooow".
A Barred owl may sound like a monkey.
Ask the children - they will know what the sound is like, especially if they have watched wild-life programmes with their parents.
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The monkey goes eeeeeeeeeeeeoooooooooooahhhhhhhhh
You first make yourself sound like a monkey then go Ou Ah Ou Ou.
The hoopoe, a bird which can be found in Afro-Eurasia, makes a sound like "oop-oop-oop."
it is referred to as a chattering sound.
oo oo a a
chatting
monkey like them 'nanners