There are 2-4 species in one genus, Cinclocerthia:
- Grey or Martinique Trembler, Cinclocerthia gutturalis : The Grey Trembler is found only in Martinique and Saint Lucia.
- Saint Lucia Trembler, Cinclocerthia (gutturalis) macrorhyncha
- (Southern) Brown Trembler, Cinclocerthia (ruficauda) ruficauda
- Northern Brown Trembler, Cinclocerthia (ruficauda) tremula
Among the living birds, these are apparently most closely related to the Pearly-eyed Thrasher (Hunt et al. 2001, Barber et al. 2004).
Their common name comes from their peculiar behavior: if excited, they will show a much more exaggerated version of the wing-flicking also seen in other mimids, for example the Northern Mockingbirds. The tremblers do not just flick their wings, but shake their entire bodies in a trembling motion.
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