CLAMATORES
Clamatores, suborder Clamatores
(noun) 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
Source: WordNet® 3.1
Clam`a*to"res, n. pl. Etym: [L. clamator, pl. clamatores, a bawler.]
(Zoöl.)
Definition: A division of passerine birds in which the vocal muscles are
but little developed, so that they lack the power of singing.
Source: Webster’s Unabridged Dictionary 1913 Edition