Hemprich’s long-eared bat (Otonycteris hemprichii) as a predator of scorpions: whispering echolocation, passive gleaning and prey selection

  title={Hemprich’s long-eared bat (Otonycteris hemprichii) as a predator of scorpions: whispering echolocation, passive gleaning and prey selection},
  author={Marc W. Holderied and Carmi Korine and Thorsten Moritz},
  journal={Journal of Comparative Physiology A},
Over 70% of the droppings of the gleaning bat Otonycteris hemprichii can contain scorpion fragments. [] Key Method We confirmed that O. hemprichi is a whispering bat (approx. 80 dB peSPL) with short, multi-harmonic calls. In a flight room we also confirmed that O. hemprichii detects scorpions by their walking noises. Amplitudes of such noises were measured and they reach the flying bat at or below the level of echoes of the loess substrate. Bats dropped straight onto moving scorpions and were stung…

A whispering bat that screams: bimodal switch of foraging guild from gleaning to aerial hawking in the desert long-eared bat

It is concluded that the desert long-eared bat switched from passive gleaning to capturing airborne insects (aerial hawking), a full bimodal switch between foraging guilds with the respective changes in source level to those typical of a true aerial hawker.

A Sting in the Night: Pallid Bat Detection of Dangerous Prey

It is predicted that under moonlit conditions, pallid bats would plan attacks on scorpion prey, therefore, being stung less often, and the role of bat vision in predator-prey interactions between a similar bat species and northern scorpions is examined.

Ultrasound avoidance by flying antlions (Myrmeleontidae)

It is argued that the high response threshold for low-frequency ultrasound is adaptive for an insect that is mainly active close to and within vegetation, because a behavioural response to the lower ultrasonic frequencies used by high-flying bats would result in evasive action in the absence of actual predation risk.

Arizona bark scorpion venom resistance in the pallid bat, Antrozous pallidus

It is shown with behavioral measures and direct injection of venom that the pallid bat is resistant to venom of the Arizona bark scorpion, Centruroides sculpturatus, and altered sodium ion channel function may partly underlie such resistance.

Threat level influences the use of venom in a scorpion species, Tityus stigmurus (Scorpiones, Buthidae)

The results suggest that T. stigmurus reacts differently depending on the stimulus level, supporting the assumption that milky venom is only used when the animal is highly stressed because this venom represents higher metabolic costs than the production of clear venom.

The sensory ecology of prey detection in the bat-eared fox (Otocyon megalotis)

This study provides empirical confirmation for anecdotal reports that the bat-eared fox is predominantly reliant on auditory cues to determine hunting success by conducting sensory trials with individuals belonging to a habituated population in the Kuruman River Reserve in South Africa.

Foraging behaviour and sensory ecology of the bat-eared fox (Otocyon megalotis)

Foxes may be able to exploit the temporal structure of natural noise to overcome foraging challenges imposed or may simply modify their foraging behaviour to avoid the effects of masking noise.



Natterer’s bat (Myotis nattereri Kuhl, 1818) hawks for prey close to vegetation using echolocation signals of very broad bandwidth

Myotis nattereri (Vespertilionidae, Chiroptera) is able to perceive prey by echolocation within a few centimeters of echo-cluttering vegetation, by using frequency-modulated search signals of very large bandwidth (up to 135 kHz).

Behavioral and ecological aspects of gleaning by a desert insectivorous bat Antrozous pallidus (Chiroptera: Vespertilionidae)

  • G. Bell
  • Environmental Science, Biology
    Behavioral Ecology and Sociobiology
  • 2004
It is concluded that A. pallidus use echolocation, and perhaps vision, to assess habitat and avoid obstacles, but locate prey by listening to their sounds, and is able to discriminate between sounds which probably indicate food from sounds which offer no reward.

Feeding Habits of the Long-Eared Desert Bat, Otonycteris hemprichi (Chiroptera: Vespertilionidae)

Visual nocturnal observations confirmed that this species captures its prey from the surface of the ground.

Prey preferences of the leopard (Panthera pardus)

This model will allow us to predict the diet of leopards in areas where dietary information is lacking, also providing information to assist wildlife managers and conservation bodies on predator carrying capacity and predator– prey interactions.

Echolocation by Insect-Eating Bats

This article describes the echolocation behavior of insect-eating bats and shows how differing circumstances such as habitat type, foraging mode, and diet favor different signal types, and outlines the perceptual tasks that must be performed by foraging bats.

Echolocation and passive listening by foraging mouse-eared bats Myotis myotis and M. blythii

It is suggested that the buzz, absent in M. blythii at least when gleaning from the same substrate, is used to assess the distance from ground and refine the landing manoeuvre, and support a role for echolocation during passive listening and suggest a functional role for buzzes in landing control.

Cues for acoustic detection of prey: insect rustling sounds and the influence of walking substrate

The data show that rustling sound amplitude and frequency content depend on substrate type, and provides for the first time estimates of realistic detection distances in the field, which range from below 1 m to over 13 m, depending on the substrate, insect mass, walking speed and background noise level.

The role of echolocation in the hunting of terrestrial prey – new evidence for an underestimated strategy in the gleaning bat, Megaderma lyra

It is shown that the gleaning bat, Megaderma lyra, is able to find silent and motionless prey on the ground, and prey-dependent shifts in sonar activity, the broadband call structure with an emphasis on higher harmonics, and a systematic shift of the calls' peak frequencies during hovering are discussed as adaptations to identifying prey by sonar.

Predation risk and state-dependent foraging in scorpions: effects of moonlight on foraging in the scorpion Buthus occitanus

The influence of moonlight on the foraging behaviour of the scorpionButhus occitanus israelis was observed, and it is suggested that the scorpions use environmental factors such as illumination and humidity as proximal cues, to evaluate levels of predation risk and food availability.

The relationship between sit and wait foraging strategy and dispersal in the desert scorpion, Scorpio maurus palmatus

It seems that the S. maurus palmatus biological relationship model can be applied, with modifications, to a wide spectrum of desert burrowing animals and suggest that many other burrowing desert animals may face the problem of unpredictability of biological resources.