What is the collective noun of warthogs?

There isn't a commonly accepted collective noun for warthogs. However, you could use some creative options:

Descriptive:

* A herd of warthogs

* A sounder of warthogs (this is the term used for wild pigs, which are related to warthogs)

* A rooting of warthogs (referring to their foraging habits)

* A snorting of warthogs (referring to their characteristic snorts)

Humorous:

* A tuskery of warthogs

* A scrum of warthogs

Ultimately, the best option depends on the context and your own personal preference.