walnut caterpillar

A group of walnut caterpillars in the fifth instar congregate on the foliar terminals of a pecan tree. In this phase, these caterpillars will quickly defoliate this tree. (Photo by Charlie Graham)

A group of walnut caterpillars in the fifth instar congregate on the foliar terminals of a pecan tree. In this phase, these caterpillars will quickly defoliate this tree.
(Photo by Charlie Graham)

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