| antiphonal four-part synchronized chorusing in a neotropical wren. | plain-tailed wrens (thryothorus euophrys) live in groups that sing synchronized choruses, the contributions of females and males alternating with each other in cycles, within which each sex sings two of the four parts, the whole achieving near perfect synchrony. as each bird has a repertoire of ca 20 phrases of each type, the synchrony also requires them to choose the same type at the same time as others of their sex. songs can last up to 2min, during which individuals join in and drop out. this ... | 2006 | 17148310 |
| simulated birdwatchers' playback affects the behavior of two tropical birds. | although recreational birdwatchers may benefit conservation by generating interest in birds, they may also have negative effects. one such potentially negative impact is the widespread use of recorded vocalizations, or "playback," to attract birds of interest, including range-restricted and threatened species. although playback has been widely used to test hypotheses about the evolution of behavior, no peer-reviewed study has examined the impacts of playback in a birdwatching context on avian be ... | 2013 | 24147094 |