Spider
The spider appears in Scripture as a wisdom image of structural fragility and self-deceiving confidence. Job's friend Bildad compares the hope of the godless to a spider's web or "spider's house" — a trust that will not hold when tested (Job 8:14). Isaiah extends the image: the wicked "weave the spider's web" (Isa. 59:5), meaning their schemes and works are insubstantial, incapable of producing what they promise, and potentially dangerous to those who touch them — "he that eateth of their eggs dieth."
The proverb writer notes that the spider (or gecko, as some translations render it) "taketh hold with her hands, and is in kings' palaces" (Prov. 30:28), using the creature's ubiquity and persistence as an image of the small things that nonetheless gain access to great places. Palestine is home to numerous spider species, and the delicacy and impermanence of the web made it a natural metaphor for self-constructed human securities that God can blow away.