Got it zipped because of the enclosed space. They used mesh laundry bags but the caterpillars were able to get out. Collect the songbird court and safely lift the caterpillars and then release them. For example, large for caterpillars to pupae and small for eggs waiting to hatch. Release butterflies as soon as their wings are dry. In the photo, my mother aligns pieces of fennel with black swallowtail pupae. Since then we have released 6 Black Swallowtails and 2 Monarchs. We have a lot of caterpillars and more (eggs on milkweed that we plant). I have just ordered another set of these pop up containers. LOVE lightning. They are strong enough for a protected area. You don't want them sitting outside in bad weather as the wind would blow them away. You are in our pavilion. We recommend.
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