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(also warning coloration and form), one of the types of protective coloration and form in animals. Aposematic coloration, which contrasts with the animal’s background, is demonstrated suddenly in response to danger and is usually combined with a threatening pose and sounds.

The back wings of certain moths of the family Sphingidae and the genus Noctuidae, as well as cicadas, locusts, and mantises, have eyelike spots or bright bands. Normally these insects are not noticeable, owing to cryptic coloration. When an enemy approaches, however, they open their back wings and unexpectedly reveal their bright coloring, which frightens off the predator. Caterpillars of the family Sphingidae assume a threatening pose, raising the front portion of the body slightly and inflating the thorax, on which eyelike spots protrude in some species. Octopuses, agamas, and chameleons assume a threatening pose and acquire vivid coloration; many reptiles also hiss. The death’s-head moth emits a sharp squeak by releasing air from its foregut.

Aposematism protects animals from predators and gives them an advantage in the struggle for life.


References in periodicals archive ?
With a plan to double the corpus currently available with RIMES from the current $ 250000 to $ 500000 over the next 18 months, the RIMES nations are already formulating a Master Plan for 2016-20 that would take into account the monsoon occurrences, among other features and create advanced early risk detection and warning mechanism for the two continents.
It also calls on UN Secretary-General Ban to foster cooperation for establishing an early warning mechanism for genocide prevention at the UN.
Approaching the building, police arrested a 33-year-old man who had been executing guard duties at the front door, and found two remote controls on his person -- one triggering a warning mechanism for those inside and another used to open the secret passages.
Earlier this year the EU Commissioner intended to activate a special early warning mechanism against Bulgaria due to the slow document processing procedures for asylum seekers and the poor living conditions.
Furthermore, it will work as an early warning mechanism for spotting problems that might take root and spread throughout an industry under the current process.
There must be an investigation into how this warning mechanism so badly failed the very people it is supposed to serve.
Ambassador Khan suggested that the strategy to address terrorism in Africa should include the following six elements: Firstly, it should focus on capacity building of the criminal justice systems at the regional, sub-regional and national levels; secondly, regional and sub-regional cooperation has to be strengthened; thirdly, the UN and the African Union should develop an early warning mechanism as a preventive measure to counter terrorism; fourthly, creating educational and economic opportunities, in particular for the young people; fifthly, the option for dialogue with those amenable and willing to renounce violence and cut off links with terrorist organizations must remain on the table and finally, emphasis also has to be laid on countering the financing of terrorism.
Brigadier Al Awadi stressed that when buying a water heater, one should make sure that it includes a temperature regulator, a warning mechanism, a safety valve, a power switch, and a thermostat.
Early warning mechanism of the system not only save the cars' from further damage but will help economically in saving money wasted due to not efficient engine temperature gauge.
The representative of UGTT stressed, in turn, the need to establish a warning mechanism to prevent ecological phenomena.
This had led to Russia using for the first time an Early Warning Mechanism established in November, designed to help EU countries prepare for a potential gas cut-off.