The Little Rush Warbler lives in wetlands with reeds and sedges. The broad taxonomic treatment includes several subspecies, some of which are treated as separate species elsewhere.
In the broad treatment that includes multiple subspecies, it is described with dark throat streaks, short wings, a graduated tail, and a slim bill.
In the broad treatment that includes multiple subspecies, it inhabits marshes and reed or sedge beds and usually skulks. It sometimes calls from high reeds and eats small insects and ant eggs.
An extinction-risk assessment has not been added yet.