The sibilant sirystes (Sirystes sibilator) is a species of bird in the family Tyrannidae. It was formerly considered conspecific with the western sirystes, the white-rumped sirystes, and Todd's sirystes.
It is found from northwestern Brazil to northeastern Argentina. Its natural habitat is subtropical or tropical moist lowland forests, where it lives mostly in the tree canopy.
It is a fairly large flycatcher sporting a black-crested crown and black wings with white edges. Its main body is grey, and it has a dark tail. The call of the Sibilant Syrestes has been described as a loud, descending “pepepew-pepepew.”[1]