VALERIE GILES / SCIENCE PHOTO LIBRARY VALERIE GILES / SCIENCE PHOTO LIBRARY
Ants on a silvery blue caterpillar (Glaucopsyche lygdamus). These ants have a symbiotic relationship with this caterpillar. The caterpillar is myrmecophilous (lives with ants) and secretes a substance that the ants feed on. In turn the ants are thought to keep the caterpillar free of parasites.
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