The cicadas are a superfamily, the Cicadoidea, of insects in the order Hemiptera. They are in the suborder Auchenorrhyncha, along with smaller jumping bugs such as leafhoppers and froghoppers. Wikipedia
Mostly found in Singapore Park.
Each male cicada has a pair of these circular ridged membranes on the back and side surface of the first abdominal segment. Contraction of a tymbal muscle attached to the membrane causes it to bend, producing a clicking sound. The tymbal springs back when the muscle is relaxed. Source: https://www.britannica.com/story/why-are-cicadas-so-noisy
This Cicada is on Singapore Stamps 1985 Insects Definitives Series
