What are these Choughs scheming on the garden wall?

Did you know the collective noun is a 'clattering' or 'chattering' of Choughs?

I prefer the latter as it seems most apt and for the sheer alliteration ?

Although Chough is now pronounced "Chuff" it was probably originally pronounced "Chew" an example of an onomatopoeic name after it's distinctive call.

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