5, see text Chalcostigma is a genus of South American hummingbirds in the family Trochilidae.

The genus Chalcostigma was introduced in 1854 by the German naturalist Ludwig Reichenbach.

[1] The type species was subsequently designated as the bronze-tailed thornbill by George Gray.

[2][3] 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.

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