I'm sure that in certain contexts you might even throw in a totally bogus, invented term and a human would be perfectly able to match this with the assumption that you're referring to "a group" just from context. Tell someone you saw a "rowlow of ravens all flying in unison" and they'll just assume you used a neologism, perhaps with some doubt or uncertainly in the back of the mind.
The weird thing about the "murder of crows" or a "parliament of rooks" is the use of such common words, especially slightly shocking ones like "murder". This raises more eyebrows and feels more like a joke for the unaware.
A "wisdom of wombats", a "lamentation of swans"... An "ambush of tigers" would certainly be interpreted as the act of ambushing.
Look at the list here [0] and you'll find it very random.
[0] https://en.wikipedia.org/wiki/List_of_animal_names