
Mecocerculus is a genus of birds in the large tyrant flycatcher family Tyrannidae.

The buff-banded tyrannulet is a species of bird in the family Tyrannidae. It is found in Argentina, Bolivia, and Peru. Its natural habitat is subtropical or tropical moist montane forests.

The rufous-winged tyrannulet is a species of bird in the family Tyrannidae. It is found in Ecuador and Peru. Its natural habitats are subtropical or tropical dry forests and subtropical or tropical moist montane forests.

The sulphur-bellied tyrannulet is a species of bird in the family Tyrannidae. It is found in the eastern Andes of Colombia, Ecuador and Peru. Its natural habitat is subtropical or tropical moist montane forests.

The white-banded tyrannulet is a species of bird in the family Tyrannidae.

The white-tailed tyrannulet is a species of bird in the family Tyrannidae.

The white-throated tyrannulet is a species of bird in the family Tyrannidae.