With all that is going on around the island, anyone able to pay attention to nature probably has noticed that this is a bad year for cicadas (Τζιτζίκια). A friend who lives in the countryside mentioned that the bugs are so loud that in order to have a quiet afternoon break of music (he mentioned Bruckner) he needs headphones to keep out the buzzing. The flip side of the inundation is that, if you eat them, this is a very good year.
Around here during a typical year the cicada/tree ration might be 3 bugs per tree. This summer it is at least twice that. You can check this yourself by directing a spray of water into/onto a buzzing tree and count the fleeing insects.
These guys do no good except as a food source for (big) birds and big others. Small dogs also seem to enjoy the crunch. Otherwise the insects damage trees by opening tree bark to deposit eggs which eventually hatch and fall to the ground (the injured tree then becomes susceptible to disease). The hatchlings then burrow into the ground and feast on tree roots for a (long) period of time before emerging to eat, sing, mate, and die.