caterpillars of Yponomeuta are patch-restricted foragers on Euonymus.
They remain together throughout their lifetime, pupating en mass in
webbing. Studies show that the caterpillars secrete a chemical marker
their silk that defines the limits of the foraging arena and holds the
Roessingh, P. 1990. Chemical
marker from silk of Yponomeuta cagnagellus. J. Chem. Ecol.16:
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