Clam·a·to·res n. pl. Zool. A division of passerine birds in which the vocal muscles are but little developed, so that they lack the power of singing.
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Clamatores
n : used in some classification systems; a suborder or
superfamily nearly coextensive with suborder Tyranni;
Passeriformes having relatively simple vocal organs and
little power of song: clamatorial birds [syn: suborder
Clamatores]