These changes in vocal properties suggest that the vocalizations are important for mutual assessment of competitive abilities in females.
When birds do vocalize at the same time as cicadas, the vocalizations primarily occur at nonoverlapping frequencies with cicada signals.
Songs are the vocalizations of birds most pleasing to people.
The vocalizations of one type of frog also reveal the number of other males located nearby.
"Undergo," a solo performed by Wu-Kang Chen, is set to the vocalizations of Meredith Monk.
The vocalizations of jacamars are squeaky, the notes sometimes being run together into a trill.
"I cannot distinguish all the subtle differences in the vocalizations," he writes, "but somehow the subtle meaning is conveyed to me".
"[I]f they are using cues, it might be the presence of other hummingbirds, or maybe the vocalizations of the hawks".
After all members were seated underneath a many-hued Zazeela light sculpture dominated by magenta, Young started the vocalizations, using his lower register to introduce various raga pitches.
The resulting work, "Sounds of Western North Atlantic Fishes: A Reference File of Underwater Biologic Sounds," identifies the vocalizations of over 150 fish.
The vocalizations of most parrots are loud, raucous screeches; generally, the larger the species, the more earsplitting the calls.
