A wolf in sheep's clothing is an idiom from Jesus's Sermon on the Mount as narrated in the Gospel of Matthew. It warns against individuals who play a duplicitous role. The gospel regards such individuals (particularly false teachers) as dangerous.
Fables based on the idiom, dated no earlier than the 12th century CE, have been falsely credited to ancient Greek storyteller Aesop (620–564 BCE). The confusion arises from the similarity of themes in Aesop's Fables concerning wolves that are mistakenly trusted, with the moral that human nature eventually shows through any disguise.
In the modern era, zoologists have applied the idiom to the use of aggressive mimicry by predators, whether the disguise is as the prey itself, or as a different but harmless species.
The phrase originates in the Sermon on the Mount by Jesus recorded in the Christian New Testament: Beware of false prophets, which come to you in sheep's clothing, but inwardly they are ravening wolves (Gospel of Matthew 7:15, King James Version). [1] The sermon then suggests that their true nature will be revealed by their actions (by their fruits shall ye know them, verse 16). In the centuries following, the phrase was used many times in the Latin writings of the Church Fathers [2] and later on in European vernacular literature. [3] A Latin proverb also emerged, Pelle sub agnina latitat mens saepe lupina (Under a sheep's skin often hides a wolfish mind). Although the story of a wolf disguised as a sheep has been counted as one of Aesop's Fables in modern times, there is no record of a fable with this precise theme before the Middle Ages, although there are earlier fables of Aesop in Greek sources to which the Gospel parable might allude.
The first fable concerning a wolf that disguises itself in a sheep's skin is told by the 12th-century Greek rhetorician Nikephoros Basilakis in a work called Progymnasmata (rhetorical exercises). It is prefaced with the comment that 'You can get into trouble by wearing a disguise' and is followed by the illustrative story. 'A wolf once decided to change his nature by changing his appearance, and thus get plenty to eat. He put on a sheepskin and accompanied the flock to the pasture. The shepherd was fooled by the disguise. When night fell, the shepherd shut up the wolf in the fold with the rest of the sheep and as the fence was placed across the entrance, the sheepfold was securely closed off. But when the shepherd wanted a sheep for his supper, he took his knife and killed the wolf.' [4] The conclusion drawn is different from the Gospel story. In the former one is warned to beware of hypocritical evil-doers; Nikephoros warns that evil-doing carries its own penalty.
The next version does not appear until three centuries later in the Hecatomythium of the 15th-century Italian professor Laurentius Abstemius. In his telling, 'A wolf, dressed in a sheep's skin, blended himself in with the flock of sheep and every day killed one of the sheep. When the shepherd noticed this was happening, he hanged the wolf on a very tall tree. On other shepherds asking him why he had hanged a sheep, the shepherd answered: The skin is that of a sheep, but the activities were those of a wolf.' Abstemius' comment on the story follows the Biblical interpretation: 'people should be judged not by their outward demeanor but by their works, for many in sheep's clothing do the work of wolves'. [5]
Certain elements of this story are to be found in Aesop's fable of the shepherd who raised a wolf cub among his dogs. When it was grown, it secretly reverted to type. If a wolf stole a sheep and the dogs could not catch it, the guardian wolf continued the chase and shared the meal with the marauder. On other occasions it would kill a sheep and share the meat with the other dogs. Eventually the shepherd discovered what was happening and hanged the wolf. What may be a reference to this story occurs in an anonymous poem in the Greek Anthology in which a goat laments that it is made to suckle a wolf-cub,
Not by my own will but the shepherd's folly.
The beast reared by me will make me his prey,
For gratitude cannot change nature. [6]
The Perry Index lists three versions of the Greek fable, numbered 234, 267, and 451. [7] Variant 234 concerns a wolf that regularly comes to view the flock, but never attempts any harm. Eventually, the shepherd comes to trust it and on one occasion leaves the wolf on guard. He returns to find his flock decimated and blames himself for being taken in. In neither case is there the suggestion by Aesop that the wolf disguised itself as a sheep. [8]
As in the case of The Walnut Tree, version 267 would not have been the first time that Abstemius adapted one of Aesop's fables to fit a contemporary idiom, in this case that of the wolf in sheep's clothing. Though the commonest retelling of the story in English follows the version by Abstemius, it is often credited to Aesop. [9]
Yet another variation on the disguise theme was included in the Cento favole morali ("100 moral fables", 1570) of the Italian poet Giovanni Maria Verdizotti. In this the wolf dresses itself as a shepherd, but when it tries to imitate his call, it wakes the real shepherd and his dogs. Since the wolf is encumbered by its disguise, it cannot get away and is killed. This is the version followed in La Fontaine's Fables (III.3). [10] The conclusion both poets draw is the same as that of Nikephoros. The story entered the English canon under the title "The wolf turned shepherd" in Roger L'Estrange's 1692 fable collection [11] and in verse as "The Wolf in Disguise" in Robert Dodsley's Select fables of Esop and other fabulists (1765). [12]
Earlier illustrations of the fable concentrated on the hanging of the wolf. More recently, the emphasis has been on the disguise. [13] In France, the theme of the wolf disguised in shepherd's clothing is more common and Gustave Doré's 1868 print of the subject [14] was later reused in the 1977 set of postage stamps from Burundi featuring this and other fables. [15]
A number of albums are titled A Wolf in Sheep's Clothing, although most are references to the idiom and the fable is not mentioned in the words of any of the songs. The same is true of many songs that have the phrase as their title. One exception is the lyric by Tackhead on their 1991 CD Strange Things, which uses the fable for a satirical attack on Capitalist entrepreneurs. [16]
In politics, the Fabian Society, a British socialist organisation founded in 1884, used a wolf in sheep's clothing in its coat of arms. This was intended to represent "its preferred methodology for achieving its goal." [17] More recently, the term has been used for its negative connotations of appearing harmless but intending consequences that the speaker considers undesirable. For example, in 1967, 'Special Districts' in US administration were so described, with the conclusion that "the proliferation of special districts is not the most desirable means of strengthening responsible local government." [18]
Zoologists have repeatedly compared predatory animals which make use of aggressive mimicry to a wolf in sheep's clothing. [19] The idiom has in addition been applied slightly more broadly for aggressive masquerade, where the predator is disguised as a harmless object, not necessarily the prey. [20] Predators which have been described using the idiom include jumping spiders, [21] [22] lacewings, [23] ant-mimicking aphids, [24] hemipteran bugs mimicking chrysomelid beetles, [25] bird-dropping spiders which masquerade as inanimate excreta, [26] orchid mantises camouflaged as flower parts, [26] cichlid fish, [27] [28] and the zone-tailed hawk which flies with vultures; [29] these animals have evolved to deceive their prey by appearing as other prey or harmless objects, or like angler fish [29] and snapping turtles [29] lure the prey by appearing as the prey's prey. The well-attested form of mimicry by predators can be contrasted with defensive mimicry by prey animals against predators, such as Batesian mimicry. [30]
In evolutionary biology, mimicry is an evolved resemblance between an organism and another object, often an organism of another species. Mimicry may evolve between different species, or between individuals of the same species. In the simplest case, as in Batesian mimicry, a mimic resembles a model, so as to deceive a dupe, all three being of different species. A Batesian mimic, such as a hoverfly, is harmless, while its model, such as a wasp, is harmful, and is avoided by the dupe, such as an insect-eating bird. Birds hunt by sight, so the mimicry in that case is visual, but in other cases mimicry may make use of any of the senses. Most types of mimicry, including Batesian, are deceptive, as the mimics are not harmful, but Müllerian mimicry, where different harmful species resemble each other, is honest, as when species of wasps and of bees all have genuinely aposematic warning coloration. More complex types may be bipolar, involving only two species, such as when the model and the dupe are the same; this occurs for example in aggressive mimicry, where a predator in wolf-in-sheep's-clothing style resembles its prey, allowing it to hunt undetected. Mimicry is not limited to animals; in Pouyannian mimicry, an orchid flower is the mimic, resembling a female bee, its model; the dupe is the male bee of the same species, which tries to copulate with the flower, enabling it to transfer pollen, so the mimicry is again bipolar. In automimicry, another bipolar system, model and mimic are the same, as when blue lycaenid butterflies have 'tails' or eyespots on their wings that mimic their own heads, misdirecting predator dupes to strike harmlessly. Many other types of mimicry exist.
The Boy Who Cried Wolf is one of Aesop's Fables, numbered 210 in the Perry Index. From it is derived the English idiom "to cry wolf", defined as "to give a false alarm" in Brewer's Dictionary of Phrase and Fable and glossed by the Oxford English Dictionary as meaning to make false claims, with the result that subsequent true claims are disbelieved.
Anti-predator adaptations are mechanisms developed through evolution that assist prey organisms in their constant struggle against predators. Throughout the animal kingdom, adaptations have evolved for every stage of this struggle, namely by avoiding detection, warding off attack, fighting back, or escaping when caught.
Flower mantises are praying mantises that use a special form of camouflage referred to as aggressive mimicry, which they not only use to attract prey, but avoid predators as well. These insects have specific colorations and behaviors that mimic flowers in their surrounding habitats.
Ambush predators or sit-and-wait predators are carnivorous animals that capture their prey via stealth, luring or by strategies utilizing an element of surprise. Unlike pursuit predators, who chase to capture prey using sheer speed or endurance, ambush predators avoid fatigue by staying in concealment, waiting patiently for the prey to get near, before launching a sudden overwhelming attack that quickly incapacitates and captures the prey.
The Cat and the Mice is a fable attributed to Aesop of which there are several variants. Sometimes a weasel is the predator; the prey can also be rats and chickens.
Aggressive mimicry is a form of mimicry in which predators, parasites, or parasitoids share similar signals, using a harmless model, allowing them to avoid being correctly identified by their prey or host. Zoologists have repeatedly compared this strategy to a wolf in sheep's clothing. In its broadest sense, aggressive mimicry could include various types of exploitation, as when an orchid exploits a male insect by mimicking a sexually receptive female, but will here be restricted to forms of exploitation involving feeding. For example, indigenous Australians who dress up as and imitate kangaroos when hunting would not be considered aggressive mimics, nor would a human angler, though they are undoubtedly practising self-decoration camouflage. Treated separately is molecular mimicry, which shares some similarity; for instance a virus may mimic the molecular properties of its host, allowing it access to its cells. An alternative term, Peckhamian mimicry, has been suggested, but it is seldom used.
Neolamprologus sexfasciatus is a species of cichlid fish that is endemic to the southern half of Lake Tanganyika in East Africa. It can reach a length of 15 centimetres (5.9 in) TL. This species can also be found in the aquarium trade. It mainly eats snails, and its pharyngeal bones and teeth are adapted to this hard-shelled prey.
In evolutionary biology, Gilbertian mimicry is a rare type of mimicry in plants involving only two species, a host or prey animal which is the mimic, and its parasite or predator, which is both the model for the mimicry, and the dupe that is deceived by it. The mechanism provides a measure of protection for the mimic, as parasites and predators rarely attack their own species.
The Morall Fabillis of Esope the Phrygian is a work of Northern Renaissance literature composed in Middle Scots by the fifteenth century Scottish makar, Robert Henryson. It is a cycle of thirteen connected narrative poems based on fables from the European tradition. The drama of the cycle exploits a set of complex moral dilemmas through the figure of animals representing a full range of human psychology. As the work progresses, the stories and situations become increasingly dark.
Chemical defense is a strategy employed by many organisms to avoid consumption by producing toxic or repellent metabolites or chemical warnings which incite defensive behavioral changes. The production of defensive chemicals occurs in plants, fungi, and bacteria, as well as invertebrate and vertebrate animals. The class of chemicals produced by organisms that are considered defensive may be considered in a strict sense to only apply to those aiding an organism in escaping herbivory or predation. However, the distinction between types of chemical interaction is subjective and defensive chemicals may also be considered to protect against reduced fitness by pests, parasites, and competitors. Repellent rather than toxic metabolites are allomones, a sub category signaling metabolites known as semiochemicals. Many chemicals used for defensive purposes are secondary metabolites derived from primary metabolites which serve a physiological purpose in the organism. Secondary metabolites produced by plants are consumed and sequestered by a variety of arthropods and, in turn, toxins found in some amphibians, snakes, and even birds can be traced back to arthropod prey. There are a variety of special cases for considering mammalian antipredatory adaptations as chemical defenses as well.
The Bird in Borrowed Feathers is a fable of Classical Greek origin usually ascribed to Aesop. It has existed in numerous different versions between that time and the Middle Ages, going by various titles and generally involving members of the corvid family. The lesson to be learned from it has also varied, depending on the context in which it was told. Several idioms derive from the fable.
The Fox and the Woodman is a cautionary story against hypocrisy included among Aesop's Fables and is numbered 22 in the Perry Index. Although the same basic plot recurs, different versions have included a variety of participants.
Deception in animals is the voluntary or involuntary transmission of misinformation by one animal to another, of the same or different species, in a way that misleads the other animal. Robert Mitchell identifies four levels of deception in animals. At the first level, as with protective mimicry like false eyespots and camouflage, the action or display is inbuilt. At the second level, an animal performs a programmed act of behaviour, as when a prey animal feigns death to avoid being eaten. At the third level, the deceptive behaviour is at least partially learnt, as when a bird puts on a distraction display, feigning injury to lure a predator away from a nest. Fourth level deception involves recognition of the other animal's beliefs, as when a chimpanzee tactically misleads other chimpanzees to prevent their discovering a food source.
The reason for the hare to be in flight is that it is an item of prey for many animals and also subject to hunting by humans. There are three fables of ancient Greek origin that refer to hare chasing, each of which also exemplifies a popular idiom or proverb.
Locomotor mimicry is a subtype of Batesian mimicry in which animals avoid predation by mimicking the movements of another species phylogenetically separated. This can be in the form of mimicking a less desirable species or by mimicking the predator itself. Animals can show similarity in swimming, walking, or flying of their model animals.
Self-decoration camouflage is a method of camouflage in which animals or soldiers select materials, sometimes living, from the environment and attach these to themselves for concealment.
Paracletus cimiciformis is a species of aphid with a complex life cycle. Its primary host plant is Pistacia and its secondary host is a grass, where it is present on the roots. Here it is associated with an ant and part of its life cycle is spent in the ant's nest.
In evolutionary biology, mimicry in vertebrates is mimicry by a vertebrate of some model, deceiving some other animal, the dupe. Mimicry differs from camouflage as it is meant to be seen, while animals use camouflage to remain hidden. Visual, olfactory, auditory, biochemical, and behavioral modalities of mimicry have been documented in vertebrates.
The sender can be thought of as behaving like a wolf in sheep's clothing
Cosmophasis bitaeniata, like comparable examples from insects (Eisner et al. 1978; Lucas & Brodeur 2001), can be likened to a wolf in sheep's clothing (e.g. Eisner et al. 1978). These predators practise aggressive mimicry by making it easy for prey to misidentify the predator as just another member of a prey group, as though lulling the prey into a false sense of security.
The dual strategy developed by the aphid P. cimiciformis outlines a complex evolutionary scenario. On the one hand, the round morph and the ants, engaged in a trophobiotic relationship, should be subjected to the conflicts of interest typical of mutualism, with selection driving each partner to maximize its benefit by giving the least of its own energy and resources. On the other hand, the flat morph and the ants can be expected to be engaged in an arms race, with selection favoring improved deceiving abilities in the aphid and increasingly finer discrimination abilities to detect noncolony members in the ants. ... We believe that, beyond providing an unusual case of a 'wolf in sheep's clothing,' this system opens up a host of interesting and potentially novel questions about the evolution of cooperation and exploitation.
In aggressive mimicry, the predator is 'a wolf in sheep's clothing'. Mimicry is used to appear harmless or even attractive to lure its prey.
The results reveal the complexity of this so-called 'aggressive mimicry': the scale-eaters are actually imitating several blue and white striped species at once, in order to trick an entire natural community. The leader of the study, Prof. Walter Salzburger, summarizes the findings thus: 'The scale-eater pursues the strategy of a wolf that dresses up as a sheep only to then go for goats and cows.'
Others rely on the technique adopted by a wolf in sheep's clothing—they mimic a harmless species. ... Other predators even mimic their prey's prey: angler fish (Lophiiformes) and alligator snapping turtles Macroclemys temmincki can wriggle fleshy outgrowths of their fins or tongues and attract small predatory fish close to their mouths.