The Gossamer-wings are a very diverse and complex family with at least 4750 species worldwide. In California, they can be grouped into the coppers (subfamily Lycaeninae), the blues (subfamily Polyommatinae), and the hairstreaks (subfamily Theclinae). Many species have mutualistic relationships with ants (myrmecophily) where the caterpillar excretes complex carbohydrates through specialized glands for the ants (similar to aphids). In return, the ants defend the caterpillar from predators and parasitoids.
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