The larvae of oak-tree eggars march in a single file in the
sweltering heat. These insects are moving to a safer place
to turn into pupae. The larvae of oak-tree eggars are masters
of disguises. They are completely exposed to enemies while
they are moving. So if a bird happens to detect them, they
are doomed. For this reason, they line up in a single file
to appear as a snake to the enemies.

"We're pit vipers with deadly venome ..."

The larvae sometimes encounter other larvae in a single file
while moving to a safer place. They charge head on, ignoring
the rules. It brings confusion. Fortunately, most insects live
in accordance with the laws of nature.

Oak Eggar / Lasiocampa quercus / 떡갈나무솔나방 / 솔나방과 (Lasiocampidae)