Chalcostigma is a genus of hummingbird in the family Trochilidae. The name of the genus is derived from the Greek khalkos meaning bronze and stigme for a spot or mark, a reference to the beard on the bronze-tailed thornbill. It contains the following species: \n* Rainbow-bearded thornbill (Chalcostigma herrani) \n* Bronze-tailed thornbill (Chalcostigma heteropogon) \n* Olivaceous thornbill (Chalcostigma olivaceum) \n* Rufous-capped thornbill (Chalcostigma ruficeps) \n* Blue-mantled thornbill (Chalcostigma stanleyi)