The slaty bunting (Emberiza siemsseni) is a species of bird in the family Emberizidae.

An adult Slaty bunting measures 13 centimeters in length and weighs 20 grams.

The plumages are brown and highly distinctive with unusual tail feathers which are broad towards the tip.

Slaty bunting's diet includes seeds, insects, and other small invertebrates.

However, migration and clearing of vegetation for agriculture are some of the threats facing this species in China.