As the development of the Western United States began, the dune dwellers such as Neduba extincta declined in population and in this specific case were driven to extinction.

It is described in the Antioch Sand Dunes, which formerly occupied a considerable acreage along the Sacramento-San Joaquin Rivers, but which are now restricted to a small, highly disturbed area under the threat of complete destruction.

[7][8] The Antioch Dunes shield-back katydid's diet included flowers, leaves, small insects, and fungi.

[9][10] The extinction of the Antioch Dunes shield-back katydid was due to the industrialization of California.

[11] When Europeans started moving into California, Neduba extincta were driven to the Antioch Dunes where they resided until their extinction,[11] recorded to have been around 1996.