Living army-ant bridges self-optimize — the colony continuously dismantles bridges that don't carry enough traffic to be worth the labor.

The spray nozzle is a rotating turret on the tip of the abdomen — aimed precisely at attackers.

Botfly eggs hatch when they sense the warmth of a host's skin — meaning the eggs only release when the moment is right.

The myth that 'bumblebees can't fly according to physics' was debunked in the 1990s — they generate lift using vortex-shedding wing motion identified by high-speed video.

Among scorpions, small claws + thick tail = high venom potency. Deathstalkers have thread-thin pincers — the venom does the work.

Dung beetles climb on top of their dung ball and 'dance' to take a celestial reading before rolling — straight-line trajectories are non-negotiable.