Distraction displays, also known as deflection display, diversionary display or paratrepsis, are anti-predator behaviours used to attract the attention of an enemy away from an object, typically the nest or young, that is being protected. They are particularly well known in birds but noted also in fish. Distraction displays are, however, not very well defined and the definition has been the subject of much debate. They are sometimes classed more generically under "nest protection behaviours" along with aggressive displays such as mobbing.
It has been suggested that distraction displays exist mainly in birds, since they have the ability to escape at the last moment out of reach of ground predators. Displays are used mainly for ground predators, and are rarely used against avian predators.
Several variations are known in these distraction displays. Nesting male three-spined sticklebacks, when approached by groups of conspecifics, will move away from the nest and simulate feeding on the substrate. Adults will feed on the eggs of nesting conspecifics.
False brooding is an approach used by plovers. The bird moves away from the nest site and crouches on the ground so as to appear to be sitting at a nest and allows the predator to approach close before escaping.
Injury feigning is one of the more common forms of distraction. The broken-wing display is particularly well known in nesting waders and plovers and doves such as the mourning dove. Birds that are at the nest walk away from the nest with one wing hung low and dragging on the ground so as to appear as an easy target for a predator. Several interpretations have been made for the evolution of the behaviour and the cognitive abilities involved.
Another display is the rodent run, which is seen in plovers as well as some passerine birds. Here the nesting bird drops to the ground or moves away, creeping along with the head held low and making turns as if dodging imaginary obstacles.
If a signal is not honest, predators can quickly learn to ignore distraction displays. Distraction displays have their cost and displaying adult birds are sometimes captured by the predator being distracted or by other opportunist predators.
- Armstrong, Edward A. (2008). "Diversionary Display". Ibis 91 (2): 179. doi:10.1111/j.1474-919X.1949.tb02261.x.
- Barrows, Edward M. (2001) Animal behavior desk reference. CRC Press. 2nd ed. p. 177 ISBN 0-8493-2005-4
- Ruxton, Graeme D; Thomas N. Sherratt; Michael Patrick Speed. (2004) Avoiding attack: the evolutionary ecology of crypsis, warning signals and mimicry. Oxford University Press. ISBN 0-19-852859-0. p. 198
- Caro, Timothy M. and Girling, Sheila (2005) Antipredator Defenses in Birds and Mammals. University of Chicago Press, pp. 343–347, ISBN 0-226-09436-7
- Sordahl, Tex A. (1990). "The risks of avian mobbing and distraction behavior: an anecdotal review" (PDF). Wilson Bulletin 102 (2): 349–352.
- Whoriskey, F. G. (1991). "Stickleback distraction displays: sexual or foraging deception against egg cannibalism". Animal Behaviour 41 (6): 989–995. doi:10.1016/S0003-3472(05)80637-2.
- Walters, Jeffrey R. (1990). "Anti-predatory behavior of lapwings: field evidence of discriminative abilities" (PDF). Wilson Bulletin 102 (1): 49–70.
- Baskett, Thomas S. and Sayre, Mark W. and Tomlinson, Roy E. (1993) Ecology and Management of the Mourning Dove. Stackpole Books, p. 167, ISBN 0-8117-1940-5.
- Ristau, Carolyn A. (1991) Aspects of the cognitive ethology of an injury-feigning bird, the piping plover. In Cognitive Ethology: The Minds of Other Animals: Essays in Honor of Donald R. Griffin By Carolyn A. Ristau, Donald Redfield Griffin. Lawrence Erlbaum Associates, pp. 91–126, ISBN 0-8058-0252-5.
- Byrkjedal, Ingvar (1989). "Nest defense behavior of lesser golden-plovers" (PDF). Wilson Bulletin 101 (4): 579–590.
- Rowley, Ian (1962). ""Rodent-Run" Distraction Display By a Passerine, the Superb Blue Wren Malurus cyaneus (L.)". Behaviour 19 (1–2): 170–176. doi:10.1163/156853961X00240.
- Eric Duffey, N. Creasey (2008). "The "Rodent-Run"Distraction-Behaviour of Certain Waders". Ibis 92: 27. doi:10.1111/j.1474-919X.1950.tb01730.x.
- Marie Read (2005) Secret Lives of Common Birds: Enjoying Bird Behavior Through the Seasons. Houghton Mifflin Harcourt, ISBN 0-618-55872-1. p. 29
- Stuart-Fox, Devi (2005). "Deception and the origin of honest signals" (PDF). Trends in Ecology and Evolution 20 (10): 521–523. doi:10.1016/j.tree.2005.08.004. PMID 16701429.
- Gochfeld, M. (1984) Antipredator behaviour: aggressive and distraction displays of shorebirds. In: Shorebirds: breeding behaviour and populations. Behaviour of marine mammals (Ed. by Burger, J. and Olla, B.), pp. 289–377. New York: Plenum Press, ISBN 0306415909.