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51.0 MB (3.0 MB compressed)
3400 x 5245 pixels
28.7 x 44.5 cm ⏐ 11.3 x 17.5 in (300dpi)
NICOLLE R. FULLER / SCIENCE PHOTO LIBRARY NICOLLE R. FULLER / SCIENCE PHOTO LIBRARY
Illustration of the life cycle of a periodical cicada (Magicicada sp.), an insect found in eastern North America. At top right, the female lays eggs. When the eggs hatch, the newly hatched nymphs drop to the ground (lower right) and burrow into the soil (bottom). Periodical cicadas then spend 13 or 17 years underground, feeding on the sap from tree roots. The final nymphal instar burrows to the surface (lower left) and emerges above ground, moulting to produce the adult winged form (upper left). The adult form is active for 4 to 6 weeks and the life cycle is completed when a male and female cicada mate (top left). The periodical cicada life cycle is highly synchronised, so that all members of a brood will emerge from below ground within weeks of each other. There are around 7 species of periodical cicada, with life cycles lasting either 13 or 17 years.
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