The plushcap (Catamblyrhynchus diadema) is a species of bird in the family Thraupidae. It is the only member of its genus Catamblyrhynchus.
The plushcap is one of the most distinctive of all Neotropical passerines in both its appearance and behavior. The plushcap (Catamblyrhynchus diadema) was in its own family until recently when it was grouped with the tanagers. It is very distinct both physically and in its behavior. The bill is broad and black. The body is a chestnut color with a bright golden-yellow forecrown. The forecrown is made up of stiff feathers. It has been speculated that these short, dense feathers are less susceptible to feather wear and more resistant to moisture than typical feathers. This may be an adaptation for its specialized feeding mode, in which it probes into dense whorls of bamboo for its prey items (Hilty et al. 1979). Juveniles are just duller versions of their parents. They are found at high elevations from northern Venezuela south to Argentina, including the coastal mountains of Venezuela and the Andes of Colombia, Ecuador, Peru, Bolivia, and extreme northwestern Argentina. They live in montane forests and secondary forests near bamboo. They forage for insects inside the bamboo. They will eat small insects, berries, and small plant matter. The overall length averages 14 cm (5.5 in) and weight averages 14.1 grams (0.5 oz).