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"If the guide stops a moment all the followers halt; if he continues the route, they all hasten after him; if he makes a circuit, they all make the circuit also. Should they find a branch of fresh green leaves, they immediately prepare to feast upon it; the ranks spread themselves upon it, each one touching his neighbor, so that not a part of the branch escapes their depridations." — Goodrich, 1859

Processionary Caterpillars

"If the guide stops a moment all the followers halt; if he continues the route, they all hasten after…

"If the guide stops a moment all the followers halt; if he continues the route, they all hasten after him; if he makes a circuit, they all make the circuit also. Should they find a branch of fresh green leaves, they immediately prepare to feast upon it; the ranks spread themselves upon it, each one touching his neighbor, so that not a part of the branch escapes their depridations." — Goodrich, 1859

Processionary Caterpillars

"If the guide stops a moment all the followers halt; if he continues the route, they all hasten after…