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   vayda (vayda@clubcyberia.co)'s status on Sunday, 04-May-2025 13:40:33 JST vayda

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   🚨 ARTHROPOD OF THE DAY 🚨
   
   Thyris fenestrella, aka the pygmy sorrel moth, belongs to a group of micro-moths called leaf miners. Named for their eating habits as larvae, leaf miner caterpillars tunnel between the top and bottom layers of leaves, “mining” them and slurping down the green goodness within. As the larvae eat their host plants from the inside, they create squiggly brown tunnels filled with poop, or frass, scrawled across the leaves. Researchers are often able to identify pygmy sorrel moths by their larvae's distinctive, spiral mining pattern.
   
   Thyris fenestrella has a wingspan of 15–20 mm. The basic color of the wings is grayish- dusky brown. The frontwings have some orange dots along the front edge and a distinctive slightly translucent whitish patch in the middle of each wing. These almost transparent areas are similar to windows (hence the Latin species name fenestrella, meaning small window). Two of such windows are present also in the middle of the hindwings. The abdomen is blackish-brown, with some slight white cross bands.
   
   The caterpillars can reach a length of about 10 millimetres (0.39 in). They are yellowish or olive green with a slightly transparent skin and numerous large black verrucae. The head is dark brown. Pupa are stubby and reddish brown.