The Cinnamon-rumped Seedeater inhabits western Mexico’s grassy areas; males show a white collar above a dark breast band.
A breeding male has a dark head and back, short dark bill, and buffy belly, with a white collar above a black breast band. Females are overall light brown.
Grass seeds form most of its diet, supplemented by berries and insects. It catches insects by jumping up into the air.
An extinction-risk assessment has not been added yet.