What is "helmetshrike"

n. Any of a group of crested prionopid birds.

The Prionopidae are a family uniting some smallish to mid-sized songbird species. One group, the helmetshrikes, were included with the true shrikes in the family Laniidae, later on split between several presumably closely related groups such as bushshrikes ( Malaconotidae) and cuckooshrikes ( Campephagidae), but are now considered sufficiently distinctive to be separated from that group as the family Prionopidae. The Prionopidae and the two former are part of a group which is generally rather homogenous but also includes the diverse vangas. The Campephagidae are a bit more distinct.