Cicada.
This is a frail creature that is said to be born in the peak of summer and dies by autumn.
Xu Xiangyang doesn't understand the differences among insects. Tilia Insects, cicadas, even cockroaches—in his eyes, there might not be much distinction between them.
And the reason why he could identify them immediately was because...
The chirping.
The incessant, tireless cicada song is a symbol of summer in people's memories.
It's said that cicada nymphs need to hide in the soil for half a year to a year before they can burrow out of the ground and metamorphose into adults. Some larvae may even remain underground for several years.
And their sole purpose since birth, the only aim this species has from its inception, is to cry out—to loudly sing at the top of their lungs day and night, regardless of whether anyone cares or is annoyed by it.