They "laugh," having a vocalization that sounds a lot like Phyllis Diller.
The Eurasian eagle-owl has a number of vocalizations that are used at different times.
As the model develops, animals exhibit a reduction in spontaneous movements and an increased muscle tone of the limbs, adopt a flexed posture, and have a decrease vocalization.
Bulls have a loud vocalization consisting of screams known as bugling, which can be heard for miles.
Calls with frequencies above 20 kHz are produced during parent-offspring interactions (Gerstein et al., 1999) mother-calf pairs are known to have a high vocalization rate, and stereotypical differences in fundamental frequency (Sousa-Lima et al., 2002).
We found that, rhesus were not willing to give up a large juice reward to listen to vocalizations indicating that, relative to a juice reward, listening to vocalizations has a low value.
We found that, contrary to our predicted hypothesis and contrary to salient visual stimuli [4], rhesus were not willing to give up a large juice reward to listen to vocalizations indicating that, relative to a juice reward, listening to vocalizations has a low value.
Given this pattern of findings from Deaner et al., we hypothesize that, within the context of the task, the value of listening to vocalizations has a low value.
The ring-tailed lemur is one of the most vocal primates and has a complex array of distinct vocalizations used to maintain group cohesion during foraging and alert group members to the presence of a predator.
While 11KT has an effect on vocalization [ 57, 58], its role in auditory physiology has not been examined.
