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Male 11Â·4 cm (4Â½ in); includes long tail. Female 7Â·5â€“8Â·2 cm (3-3Â¼ in)
 Discosura vs. Popelairia
Sibley & Monroe (1996) place Wire-crested Thorntail (popelairii), Black-bellied Thorntail (langsdorffi), and Coppery Thorntail (letitiae) in the genus Popelairia. However, Howard & Moore (2003) and Clements (2008) place these three taxa in Discosura, and Opus follows.
They are to be found in humid forests and forest edges
Their diet consists of nectar from flowers from inga trees; they also catch insects on the wing.
They will readily visit garden feeders.
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