The spelling of the word "periodical cicadas" can be explained using the International Phonetic Alphabet (IPA). The word is pronounced /pɪrˈaɪ.ədɪkəl saɪˈkeɪdəz/. The first syllable is pronounced as "peer" with emphasis on the "i" sound. The second syllable is pronounced as "o" sound like in the word "pot". The third syllable is pronounced as "i" sound like in the word "kit". The fourth syllable is pronounced as "kul". The word refers to a type of cicada that appears in large numbers every 13 or 17 years.
Periodical cicadas, scientifically known as Magicicada spp., are a fascinating group of insects belonging to the order Hemiptera. These cicadas are unique in that they have an exceptionally long life cycle compared to other members of their family. They are named 'periodical' due to their distinct behavior of emerging from the ground in large numbers at regular intervals, commonly every 13 or 17 years.
These insects spend the majority of their lives underground as nymphs, feeding on plant roots, before transforming into adults. Once the conditions are suitable, typically triggered by soil temperature reaching a specific threshold, the nymphs emerge and undergo a remarkable metamorphosis. The adults have distinctive features like large, bulging eyes, transparent wings, and a loud buzzing mating call.
Periodical cicadas are renowned for their synchronized mass emergence, which often occurs in vast numbers referred to as 'broods.' The simultaneous emergence of an entire brood is a remarkable biological phenomenon. During this period, usually lasting a few weeks, the air is filled with the loud, droning chorus of cicada songs. The males gather in tree tops, producing their characteristic mating calls to attract females.
While periodical cicadas are harmless to humans, they can cause temporary disturbances due to the sheer number of individuals and the noise they create. Additionally, their emergence has ecological impacts, with their mass hatching providing an enormous food source for various predators, as well as contributing to nutrient cycling in the ecosystem.
In conclusion, periodical cicadas are a captivating insect species with an extraordinary life cycle, characterized by synchronized mass emergence every 13 or 17 years. Their remarkable behavior, distinctive appearance, and loud chorus of songs make them an intriguing component of the natural world.
The word "periodical" in the term "periodical cicadas" refers to the regular and cyclical emergence of these insects. They are known for their unique lifecycle, emerging from the ground once every 13 or 17 years.
The word "cicada" comes from the Latin term "cicada" which referred to this type of insect. The Latin term was borrowed from the Ancient Greek word "kikadas" or "kikaris".
So, overall, the term "periodical cicadas" combines the concept of the cicada insect with their characteristic periodic emergence cycle.