Thelymitra improcera is a deciduous terrestrial orchid known in Tasmania from just a few sites on King Island, all restricted to an area of about one square kilometre. While abundance data is scarce, it is likely that the species occupies less than 1 ha and consists of fewer than 250 individuals, putting the species at a high risk of local extinctions due to the small size of sites. The species grows within a few kilometres of the coast on peaty or sandy loams in heathland or woodland, as well as dry scrub. Vegetation clearance represents the main threat to the species, additional threats including a lack of disturbance, stochastic events and climate change.