Alarm signal
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Meaningful call combinations and compositional processing in the southern pied babbler Open
Significance Human language is syntactic in its nature: meaningful words are assembled into larger meaningful phrases or sentences. How unique this ability is to humans remains surprisingly unclear. A considerable body of work has indicate…
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Traffic noise drowns out great tit alarm calls Open
Anthropogenic noise is one of the fastest growing and most ubiquitous types of environmental pollution and can impair acoustic communication in a variety of animals [1]. Recent research has shown that birds can adjust acoustic parameters o…
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Semantic communication in birds: evidence from field research over the past two decades Open
What do animal signals mean? This is a central question in studies on animal communication. Research into the semantics of animal signals began in 1980, with evidence that alarm calls of a non‐human primate designated predators as external…
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When the birds go unheard: highway noise disrupts information transfer between bird species Open
Highway infrastructure and accompanying vehicle noise is associated with decreased wildlife populations in adjacent habitats. Noise masking of animal communication is an oft-cited potential mechanism underlying species loss in sound-pollut…
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Cooperative breeding influences the number and type of vocalizations in avian lineages Open
Although communicative complexity is often predicted to correlate with social complexity in animal societies, few studies have employed large-scale comparative analyses to test whether socially complex species have more complex systems of …
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Why does noise reduce response to alarm calls? Experimental assessment of masking, distraction and greater vigilance in wild birds Open
Environmental noise from anthropogenic and other sources affects many aspects of animal ecology and behaviour, including acoustic communication. Acoustic masking is often assumed in field studies to be the cause of compromised communicatio…
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Assessment of Laying Hens’ Thermal Comfort Using Sound Technology Open
Heat stress is one of the most important environmental stressors facing poultry production and welfare worldwide. The detrimental effects of heat stress on poultry range from reduced growth and egg production to impaired health. Animal voc…
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Application of open field, tonic immobility, and attention bias tests to hens with different ranging patterns Open
Assessment of negative affective states is a key component of animal welfare research. In laying hens, excessive fearfulness results in reduced production and increased sensitivity to stress. Fearfulness can be defined as a response to a k…
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Rival group scent induces changes in dwarf mongoose immediate behavior and subsequent movement Open
In many social species, groups of animals defend a shared territory against rival conspecifics. Intruders can be detected from a variety of cues, including fecal deposits, and the strength of response is expected to vary depending on the i…
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Alarm calls evoke a visual search image of a predator in birds Open
Significance In human speech, words often cause listeners to retrieve visual mental images of target objects. In nonhuman animal communication systems, many key, language-like features have been demonstrated, but there is still no evidence…
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Honey Bee Inhibitory Signaling Is Tuned to Threat Severity and Can Act as a Colony Alarm Signal Open
Alarm communication is a key adaptation that helps social groups resist predation and rally defenses. In Asia, the world's largest hornet, Vespa mandarinia, and the smaller hornet, Vespa velutina, prey upon foragers and nests of the Asian …
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Zebra reduce predation risk in mixed-species herds by eavesdropping on cues from giraffe Open
Predation risk of individuals moving in multispecies herds may be lower due to the heightened ability of the different species to detect predators (i.e., mixed-species effect). The giraffe is the tallest land mammal, maintains high vigilan…
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Olfactory Strategies in the Defensive Behaviour of Insects Open
Most animals must defend themselves in order to survive. Defensive behaviour includes detecting predators or intruders, avoiding them by staying low-key or escaping or deterring them away by means of aggressive behaviour, i.e., attacking t…
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Alarm call‐based discrimination between common cuckoo and Eurasian sparrowhawk in a Chinese population of great tits Open
Morphological resemblance of the common cuckoo Cuculus canorus to the Eurasian sparrowhawk Accipiter nisus has been regarded as an example of predator mimicry. Common hosts could distinguish parasites as the result of coevolution, while ra…
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Subtle variations in mobbing calls are predator-specific in great tits (Parus major) Open
Many species are known to use vocalizations to recruit con- and heterospecifics to mobbing events. In birds, the vocalizations of the Family Paridae (titmice, tits and chickadees) are well-studied and have been shown to recruit conspecific…
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Eavesdropping grey squirrels infer safety from bird chatter Open
When multiple species are vulnerable to a common set of predators, it is advantageous for individuals to recognize information about the environment provided by other species. Eastern gray squirrels (Sciurus carolinensis) and other small m…
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Bright birds are cautious: seasonally conspicuous plumage prompts risk avoidance by male superb fairy-wrens Open
Increased predation risk is considered a cost of having conspicuous colours, affecting the anti-predator behaviour of colourful animals. However, this is difficult to test, as individual factors often covary with colour and behaviour. We u…
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Social shaping of voices does not impair phenotype matching of kinship in mandrills Open
Kin selection theory provides a strong theoretical framework to explain the evolution of altruism and cooperative behaviour among genetically related individuals. However, the proximate mechanisms underlying kin discrimination, a necessary…
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Social information use in threat perception: Social buffering, contagion and facilitation of alarm responses Open
Group living animals can use the behavior of others as cues for the presence of threat in the environment and adjust their behavior accordingly. Therefore, different social phenomena that modulate the response to threat, such as social buf…
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Titi monkeys combine alarm calls to create probabilistic meaning Open
Field experiments reveal that titi monkeys probabilistically encode predator type and location using call combinations.
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Are social attributes associated with alarm calling propensity? Open
Emitir llamadas de alarma puede beneficiar directamente a las personas si las personas que llaman tienen una mayor probabilidad de sobrevivir, si la llamada aumenta el estado de la persona que llama o si la función de llamada se realiza me…
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Elaborate Mimetic Vocal Displays by Female Superb Lyrebirds Open
Some of the most striking vocalizations in birds are made by males that incorporate vocal mimicry in their sexual displays. Mimetic vocalization in females is largely undescribed, but it is unclear whether this is because of a lack of sele…
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Home Security Alarm Using Wemos D1 And HC-SR501 Sensor Based Telegram Notification Open
—Home Security Alarms in today's modern society only use CCTV that can only see the person without any notification that goes into the cellphone in dealing with the theft that occurred. To help the community in dealing with the theft that …
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Persistence of pain in humans and other mammals Open
Evolutionary models of chronic pain are relatively undeveloped, but mainly concern dysregulation of an efficient acute defence, or false alarm. Here, a third possibility, mismatch with the modern environment, is examined. In ancestral huma…
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Behavioral responses to conspecific mobbing calls are predator‐specific in great tits (<i>Parus major</i>) Open
When facing a predator, animals need to perform an appropriate antipredator behavior such as escaping or mobbing to prevent predation. Many bird species exhibit distinct mobbing behaviors and vocalizations once a predator has been detected…
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Pattern discovery in critical alarms originating from neonates under intensive care Open
Patient monitoring generates a large number of alarms, the vast majority of which are false. Excessive non-actionable medical alarms lead to alarm fatigue, a well-recognized patient safety issue. While multiple approaches to reduce alarm f…
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Sentinel dominance status influences forager use of social information Open
Animals in social groups can acquire information about the need for antipredator behavior by personally sampling the environment or from information provided by others. Use of such social information is expected to be adjusted according to…
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Heterospecific alarm-call recognition in two warbler hosts of common cuckoos Open
Species facing similar selection pressures should recognize heterospecific alarm signals. However, no study has so far examined heterospecific alarm-call recognition in response to parasitism by cuckoos. In this study, we tested whether tw…
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Evidence for individual discrimination and numerical assessment in collective antipredator behaviour in wild jackdaws ( <i>Corvus monedula</i> ) Open
Collective responses to threats occur throughout the animal kingdom but little is known about the cognitive processes underpinning them. Antipredator mobbing is one such response. Approaching a predator may be highly risky, but the individ…
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Speedy revelations: how alarm calls can convey rapid, reliable information about urgent danger Open
In the perpetual struggle between high-speed predators and their prey, individuals need to react in the blink of an eye to avoid capture. Alarm calls that warn of danger therefore need to do so sufficiently rapidly that listeners can escap…