Silver-Y moth
appears in northern parts of Europe until November, migrating back to southern Europe for the winter months. The moths can fly 2,000 to 2,500 km. In temperate [...] form a greenish to black pupa, either in leaves which are woven together with silk threads, or in a suitable hiding place spun somewhere in greenhouse material [...] often in large swarms. They fly rapidly from flower to flower, often resting with their wings folded roof-like above the body. The female lays up to 2,000