Are any of these collective nouns hoaxes? [duplicate]
It appears that the following g terms are actually used, known as “terms of venery”
As for cackle, the following extract from Quora comments:
There is also a poetic term, 'a cackle of hyenas', but this is very rarely used, much like 'a dazzle of zebras' - no zoologist would use these terms. They would say 'a clan of hyenas' and 'a herd of zebras'.
Memory of Elephants