It's been known since the 1930s, with the discovery of bat echolocation, that animals can produce pitches too high for human hearing.
Flying foxes use their excellent eyesight more than echolocation, or bouncing sounds, to locate their food at night.
Like bats, dolphins use echolocation, an internal sonar system, to help them navigate, avoid predators and find food.
Moths typically go into erratic dives when they sense that they have been detected by nearby bats using echolocation.
Horseshoe bats have a special kind of echolocation, which allows them to use the Doppler shift to detect the flutter of moth wings.
You can imagine, for instance, the way certain animals use echolocation to find a target or source.
This structure may help focus the sound emitted by these animals in echolocation and feeding.
Some bats seem to either fly too high to be trapped often or have supersensitive echolocation skills that help them avoid capture.
Odontocete cetaceans rely upon echolocation to sense the environment and detect prey.
Using echolocation, its sophisticated sonar system, each bat may catch and eat several stomachfuls of insects in a single night.
Using echolocation, ghost bats hunt for large insects, lizards, frogs, birds and even other bats.
A greater horseshoe bat, so named because of the horseshoe-shape fold of skin called a nose leaf used for echolocation.
Greater horseshoe bats are named for the horseshoe-shape of the fold of skin called a nose leaf, which many bat species use for echolocation.
The ear is the most important sense organ for modern toothed whales, say scientists, because these whales locate their prey using echolocation.
Like most insectivorous bats, the New Zealand short-tailed bat hunts insects in the air by using echolocation.
Like bats using echolocation to navigate through the night, geophysicists rely on seismic waves for information on the Earth's deep interior.
The rivers used by most platanistids are muddy, and these animals probably rely on echolocation more than vision to locate their prey.
Toothed whales, such as dolphins, rely on this auditory sense when hunting prey by echolocation.
They need to be able to process the complex information that they get from echolocation, and they need to be able to control their membranous wings.
Vocal behaviour: They emit repetitive clicks and low-pitched sounds to communicate and for echolocation purposes.
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These sound emissions are particularly severe for marine mammals, which find their bearings through echolocation.
This is a type of natural sonar called echolocation and is very useful when searching for food or navigating in murky water.
This is probably both for echolocation and contact calls, usually during deep diving.
This whale possesses a highly developed hearing and echolocation system that is essential for finding food, navigating and communicating.
The term echolocation refers to an ability that toothed whales have that lets them locate and make out objects by listening for echoes.
For example, echolocation by bats and toothed whales is dependent on the sound transmission properties of air and water that can change with temperature or density.
The boats might interfere with the beluga whales' echolocation method of hunting.
Research suggests that noise from whale watching boats may interfere with the animals' echolocation and communication, making it more difficult for them to hunt for fish.
But their hearing and echolocation is the greatest almost of any animal.
Many odontocetes can navigate by echolocation, producing sound waves using a complex system of nasal sacs and passages, and using the echoes to navigate.
Therefore, it is unknown if exposure to seismic sound can result in reduced echolocation efficiency in marine mammals.
An additional explanation for the absence of either mode in Microchiroptera is their reliance on echolocation, and their need to maintain regular sensory input.
Like other dolphins, Killer whales use echolocation to sense their surroundings and search for prey.
Pacific white-sided dolphins also use clicking sounds, known as echolocation, to find their way around and to catch their food.
Moreover dolphins can eavesdrop on one another's echolocation click streams.
Most errors in acoustic bat species determination are caused by the intraspecific variability of echolocation calls.
They are thought to use this to focus sound waves for echolocation, and may be able to produce sound so intense that it can stun their prey.
Students will learn how sound can be used to track an object and how a whale uses echolocation to track food.
The molecular phylogeny presented here is consistent with either two independent origins of echolocation within the chiropteran lineage or a single origin.
Cetacean sounds can be roughly divided into communication signals and echolocation signals.
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This system of echolocation allows them to determine the location, nature and movement of objects that would otherwise be invisible.
The detection of echolocation calls can therefore not be used directly to obtain an estimate of the number of individuals present.
An ultrasonic microphone detected the sound waves of the bats' echolocation chirps.
The most notable adaptation is the development of echolocation in whales and dolphins.
Microbats use echolocation, but megabats do not, with the exception of the genus Rousettus.
The first is that laryngeal echolocation evolved twice in bats, once in Yangochiroptera and once in the rhinolophoids.
Bat echolocation is a perceptual system where ultrasonic sounds are emitted specifically to produce echoes.
Microbats and toothed whales including oceanic dolphins vocalize both socially and in echolocation.
The performers, who are positioned in the corners of the room, seem to map the space with tones, like bats using echolocation to navigate a lightless cave.
For the study, researchers first tested the ability of four greater mouse-eared bats to distinguish between the echolocation calls of other bats.
Underwater noise pollution is often a direct threat to migrating cetaceans, given their reliance on sound for navigation through their highly developed echolocation systems.
Bats have echolocation capacities allowing them to create the mental equivalent of a sonogram of the night world through which they must navigate at rapid speeds, searching for foods that include rapidly flying insects.
Of greatest interest are the rapidly pulsated clicks that are emitted in shorter or longer bursts and that are used by the oilbird for navigation in total darkness on the principle of echolocation.
As a Harvard undergraduate, he discovered that bats produce ultrasonic sounds and avoid objects that reflect these sounds, thus proving that the animals orient themselves by echolocation.
To help with finding food, dolphins use echolocation.
Bats navigate and hunt mainly by means of echolocation, and it is possible that the low-level flights could have a negative impact on their hearing ability and, consequently, on their hunting efficiency at night.
Do seals use echolocation in the same way that toothed whales do?
Dolphins and porpoises can find food using echolocation.
The Oilbird is one of the few bird species to use batlike echolocation to help navigate the night and cave darkness.
We measured the duration, interelement interval, peak frequency and bandwidth of echolocation pulses and distress syllables.
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The clicks are directional and are for echolocation, often occurring in a short series called a click train.
Dolphin echolocation clicks are amongst the loudest sounds made by marine animals.
Dolphins search for prey primarily using echolocation, which is similar to sonar.
Microbats rarely fly in rain, it interferes with their echolocation, and they are unable to locate their food.
The dolphins use echolocation to navigate and hunt in the river's tricky depths.
The skull of a newly identified species of extinct toothed whale may help scientists piece together when echolocation evolved underwater.
Allen's big-eared bat is the only species in North America known to emit long, constant frequency-frequency modulated echolocation calls.
Known as echolocation, it enables people with reduced visibility to use their own voices to recognise objects which could form barriers.
Healthy bats fly by echolocation, a sort of natural sonar, which helps them avoid contact with objects, including humans.
Other moth species can produce signals to jam bat echolocation.
Scientists are studying bats and their use of echolocation to learn more about how bats process information to understand and adapt to the world around them.
Transmission beam pattern and echolocation signals of a harbour porpoise.
Toothed whales also use echolocation, but, as opposed to the vocal membrane that extends upward from the vocal folds, they have a melon to manipulate sounds.
It has been reported that brown rats use ultrasound for echolocation.
It is unknown why porpoises become entangled in gill nets, since several studies indicate they are able to detect these nets using their echolocation.
Beyond locating an object, echolocation also provides the animal with an idea on an object's shape and size, though how exactly this works is not yet understood.
The research team discovered that the connection between the larynx and the ear via the stylohyal bone in the hyoid chain was unique to bats that used laryngeal echolocation.
The Eocene bats Icaronycteris and Palaeochiropteryx had cranial adaptations suggesting an ability to detect ultrasound, implying they used echolocation.

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