Shows a fly—pest, buzzing, summer, garbage, or annoyance.

Shows a cockroach—pest, dirty places, toughness, ‘survives anything,’ or gross‑out humor.

Shows a mosquito—bites, itching, pests, summer, or disease caution.

Shows a spider web—Halloween, spooky decor, traps, or something long‑neglected and dusty.

Shows a bug—an insect, or metaphorically a software bug, glitch, or issue.