Several species are known. One day I was searching the dry gullies running into the Clutha River gorge near my home. Individual moa bones are often found poking out of the gully walls. Moa egg shell fragments are common in Central Otago. They are often found where sediment has washed down a gully, or in rock overhangs where the birds used to nest.
Most egg shell is white, but a rarer form is green.
There are fragments of both in this photograph. The largest piece is over ten cm long. Moa feathers are to be found in the very dry cave of Central Otago as well, though I think they may be difficult to distinguish from kiwis. The feathers in this scan have the typical ratite lack of barbs, and some of them are also 'double-shafted', another character of ratites. The colour in this scan is a little redder and more yellow than the original.