Paryphanta watti is found in the Aupōuri Peninsula, at the northern tip of the North Island in Northland Region, New Zealand[1] Location within the Aupōuri Peninsula include Te Paki, Kohuronaki and Unuwhao[2] Snails showed a preference for high elevation, with no live snails being found below a height of 120m and no snail shells found below 100m.

The aperture of snails has a hard ridge formed by the inward rolling of the edge in adults whereas in juveniles, it is instead replaced by a soft lip where the periostracum projects past the ostracum.

The shell exhibits cryptic colouration, helping the snail blend in with the leaf litter and surrounding vegetation.

[5] Snails also tend to be more active when the weather is cool and wet,[2] predominantly more apparent on the surface during the months of April to July and August to September.

These snails have also displayed predation of juveniles its own species (cannibalism) but there has been no evidence to suggest they feed on carrion.

[5] Some of these deaths were due to predation however the large majority of dead snails were identified by in tact but empty shells, suggesting rates of desiccation that correlate with the conditions.

[2] Egg laying predominantly occurs in the months of November to February[5] and from August to September.

[2] Egg shells were initially covered by a membrane consisting of a smooth and slightly adhesive, tough white layer.

[2] Predation by pigs lead to the complete crushing of snail shells, evidence on teeth marks and indentation on remaining fragments.

Human activity have greatly reduced the range of these snails through the destruction of native forest on the Aupōuri Peninsula.

Pigs predate on the snails as well as reducing the habitat of Paryphanta watti through rooting and distribution of the lead litter.