Pine Tube Moth

Individual Pine Tube Moth (Argyrotaenia pinatubana) caterpillars use silk to form a hollow tube by binding together 10 - 20 needles.  They then move up and down their silk-lined tube to feed on the tips of the bound needles.  Once they've almost eaten themselves (literally) out of house and home, the caterpillars will move to another set of needles to repeat their tube-making needle-feeding behavior.  The caterpillars eventually pupate within their needle tubes.

...