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1 day ago · Pairs of black tentacles begin to grow, a larger pair on the thorax and a smaller pair on the abdomen. The second instar is usually between 6 mm (0.24 in) and 1 cm (0.39 in) long. [37] Fifth-instar monarch larva eating milkweed leaves (Some at 20 × speed). A second-instar larva grazing on leaf and cutting through a latex vein.
