These round, 1 mm across galls occur on the underside of leaves, and eventually detach and fall into the leaf litter.

Adults emerge early the following spring and lay eggs for the bisexual generation.

[1] Once they have fallen to the ground, the unisexual galls of Neuroterus saltatorius "jump" due to the movements of the larvae inside.

[2] A study at University of California, Santa Cruz found this behavior happened during dry weather at temperatures between 20–40 °C (68–104 °F).

[4] This behavior might help the galls dig deeper into the leaf litter for protection from the elements or predators.