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At Shady Oak Butterfly Farm, butterfly and moth pupae (chrysalises or cocoons) are removed from their rearing containers in the laboratory. They are taken to the pupae laboratory and sterilized before 'pinning'. Some farmers do not hang their pupae upside down to emerge but simply glue them to a paper towel laying flat. When they emerge, they climb up the side of the container to fill and dry thier wings. Different farmers use different methods. Much of the choice is due to simple personal preferance. At Shady Oak, we hang them upside down because their wings are so easliy damaged when they are soft. When they spend their first minute after emerging climbing up to hang, they are often climbing over other butterflies which have just emerged and may tear each others wings while they are so soft. We have not tested this theory, it is simply a theory. |