[摘要] The Charadriiformes arose in the Cretaceous >90 mya, and multiple later divergences took place within both Charadrii and Scolopaci in the Cretaceous and Tertiary (
Paton et al. 2003,
Paton and Baker 2006,
Baker et al. 2007,
Tavares and Baker 2008;
Fig. 1). Shorebirds are attractive for investigating rates of evolutionary change in vocal displays for several reasons: their vocalizations are not learned and so are not subject to short-term cultural evolution as occurs in songbirds; vocalizations show little to no geographic variation within species (
Miller et al. 1983,
Miller 1986); complex loud vocalizations, and repertoires composed of discrete sound classes, occur in many species (
Miller 1984,
1996a); and wellresolved phylogenies with divergence times are available (
Paton et al. 2003,
Buehler and Baker 2005,
Pereira and Baker 2005,
Paton and Baker 2006,
Baker et al. 2007,
Tavares and Baker 2008).
