摘要
DEAR EDITOR,The“call for help”hypothesis proposes that alarm calls produced by a bird can transmit warning information to both conspecific and interspecific neighbors.Neighbors who are attracted by social transmission might benefit from knowing about the presence of danger or by gaining information about the presence of predators or brood parasites nearby.Brood parasite hosts can distinguish threats from different intruders and exhibit varied responses correspondingly.
基金
the Hainan Provincial Natural Science Foundation of China(2019RC189 to C.C.Y.)
National Natural Science Foundation of China(31672303 to C.C.Y.and 31970427 to W.L.)
Hainan Provincial Innovative Research Program for Graduates(Hyb2019-34 to J.J.W.)。
