Iggies are surface nesters like Beardeds, varanids are deep nesters.

Reason is, iggie eggs bearded eggs, etc, hatch very quickly, 65 days or so, sometimes much less, Our local surface nesters hatch in 28 days or so

. Varanid eggs take 4 months to over a year to hatch. So the nest has to be consistant for a very long time and almost always spanning several seasons.

So its a very very different kind of nesting and for good reason. Cheers