Butterfly eggs can be smooth or textured, their shapes can be oval or round, but never bottle-shaped. Butterfly eggs are normally attached to a plant--usually the leaf- with a special fluid. This glue holds the eggs to the leaf in such a way that they cannot be separated without destroying the eggs. Small funnel-shaped openings called "micropiles" can be found on top of each egg. This is where water and air enter while the egg is developing. Each egg is surrounded by a chorion, a hard outer shell that protects the larva. Some shells have raised ribs.
So no butterfly eggs
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leachy