No data concerning any call notes or sounds other than those described
above are at hand, with the following exception: Price (in Allen, 1895,
213), who studied the habits of the animal in the moonlight, at Willcox,
Ariz., says that a low chuckle was uttered at intervals; and Vorhies has
had one captive female that would repeatedly utter a similar chuckle in
a peevish manner when disturbed by day, and one captive male which, when
teased into a state of anger and excitement, would squeal much like a
cornered house rat. Vorhies has spent many moonlight hours observing
kangaroo rats, but without ever hearing a vocal sound uttered by free
individuals.