Infrared video and ultrasonic recordings were made of echolocating big brown bats hunting for June beetles in the short May–June “beetle season.” Adult beetles emerge from the ground at twilight, beat their wings to warm up, and fly into nearby trees, where they swarm actively for ∼1 h. Beetles are attacked by bats while buzzing in the grass, while flying in the open during their brief ascent, and while still active among the leaves of trees. Bats routinely used different capture strategies during the course of a few minutes and may hear the beetles’ buzzing to guide attacks in vegetation.
REFERENCES
1.
D. R. Griffin, Listening in the Dark (Yale University Press, New Haven, CT, 1958; reprinted by Cornell University Press, Ithaca, NY, 1986).
2.
G. Sales and J. D. Pye, Ultrasonic Communication by Animals (Chapman and Hall, London, 1974).
3.
M. B. Fenton, “Detecting, recording, and analyzing vocalizations of bats,” in Ecological and Behavioral Methods for the Study of Bats, edited by T. H. Kunz (Smithsonian Institution Press, Washington, D.C., 1988), pp. 91–104.
4.
T. A.
Vaughan
, “Nocturnal behavior of the African false vampire bat (Cardioderma cor)
,” J. Mammal.
57
, 227
–248
(1976
).5.
R. M. R. Barclay and G. P. Bell, “Marking and observational techniques,” in Ecological and Behavioral Methods for the Study of Bats, edited by T. H. Kunz (Smithsonian Institution Press, Washington, D.C., 1988), pp. 59–76.
6.
J. A.
Simmons
, D. J.
Howell
, and N.
Suga
, “The information content of bat sonar echoes
,” Am. Sci.
63
, 204
–215
(1975
).7.
H.-U. Schnitzler and O. W. Henson, Jr., “Performance of airborne animal sonar systems. I. Microchiroptera,” in Animal Sonar Systems, edited by R.-G. Busnel and J. F. Fish (Plenum, New York, 1980), pp. 109–181.
8.
J. A.
Simmons
, M. B.
Fenton
, and M. J.
O’Farrell
, “Echolocation and pursuit of prey by bats
,” Science
203
, 16
–21
(1979
).9.
J. A.
Simmons
and R. A.
Stein
, “Acoustic imaging in bat sonar: echolocation signals and the evolution of echolocation
,” J. Comp. Physiol.
135
, 61
–84
(1980
).10.
H. D. J. N.
Aldridge
and I. L.
Rautenbach
, “Morphology, echolocation, and resource partitioning in insectivorous bats
,” J. Anim. Ecol.
56
, 763
–778
(1987
).11.
G.
Neuweiler
, “Auditory adaptations for prey capture in echolocating bats
,” Physiol. Rev.
70
, 615
–641
(1990
).12.
M. B.
Fenton
, “The foraging behaviour and ecology of animal-eating bats
,” Can. J. Zool.
68
, 411
–422
(1990
).13.
M. B. Fenton, “Natural history and biosonar signals,” in Hearing by Bats, edited by A. N. Popper and R. R. Fay (Springer, New York, 1995), pp. 37–86.
14.
E. K. V. Kalko and H.-U. Schnitzler, “How echolocating bats approach and acquire food,” in Bat Biology and Conservation, edited by T. H. Kunz and P. A. Racey (Smithsonian Institution Press, Washington, D.C., 1998), pp. 197–204.
15.
H.-U. Schnitzler and E. K. V. Kalko, “How echolocating bats search and find food,” in Bat Biology and Conservation, edited by T. H. Kunz and P. A. Racey (Smithsonian Institution Press, Washington, D.C., 1998), pp. 183–196.
16.
H.-U.
Schnitzler
, C. F.
Moss
, and A.
Denzinger
, “From spatial orientation to food acquisition in echolocating bats
,” Trends Ecol. Evol.
18
, 386
–394
(2003
).17.
H.-U.
Schnitzler
, E. K. V.
Kalko
, I.
Kaipf
, and A. D.
Grinnell
, “Fishing and echolocation behavior of the greater bulldog bat, Noctilio leporinus, in the field
,” Behav. Ecol. Sociobiol.
35
, 327
–345
(1994
).18.
J. A.
Simmons
, K. M.
Eastman
, and S. S.
Horowitz
, “Versatility of biosonar in the big brown bat, Eptesicus fuscus
,” ARLO
2
, 43
–48
(2001
).19.
20.
J.
Hamr
and E. D.
Bailey
, “Detection and discrimination of insect flight songs by big brown bats (Eptesicus fuscus)
,” Biol. Behav.
10
, 105
–121
(1985
).21.
E. R.
Buchler
and S. B.
Childs
, “Orientation to distant sounds by foraging big brown bats (Eptesicus fuscus)
,” Anim. Behav.
29
, 428
–432
(1981
).22.
T. G.
Forrest
, H. G.
Farris
, and R. R.
Hoy
, “Ultrasound acoustic startle response in scarab beetles
,” J. Exp. Biol.
198
, 2593
–2598
(1995
).© 2005 Acoustical Society of America.
2005
Acoustical Society of America