casebearer moth
Quick Summary
Casebearers are the larvae of moths belonging to the family Coleophoridae. These light brown insects with dark heads feed on various trees, including apple, birch, cherry, and willow.1
Initially, larvae feed as leaf miners. As they grow, they develop into casebearers, creating protective cases from leaves, twigs, silk, and excrement. These cases, which vary in shape from cigar-like to pistol-like, are attached to branches, fruits, or leaves, providing camouflage and protection. The larvae emerge from these cases to feed and overwinter within them.1
Most adult casebearer moths are pale brown or gray, with a wingspan under 12 mm (0.5 inch) and narrow, pointed wings fringed with hair. Examples include the larch casebearer, which mines larch leaves, and the clover casebearer, whose larvae feed on clover seeds. Larvae of Lepidoptera, including casebearers, spin silk threads for grip and construct shelters.1234
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