Whether butterfly specimens can be preserved for a long time depends on whether the preservation environment and anti-corrosion measures are in place when the specimens are made. After the butterfly specimen is made, the body part is still organic and will be invaded by external factors, so it should be kept in a sealed space, protected from light, moisture and dust, otherwise it will still be moth-eaten, mildewed and brittle. Poor preservation of specimens is also one of the reasons why specimens cannot be preserved for a long time. Under normal circumstances, insect specimens are naturally dried, and the protein of the body is not completely solidified. Under some external conditions, these protein are vulnerable to the attack of ubiquitous microorganisms, leading to decay in the future. At present, there is no authoritative data on the actual preservation period of specimens, but the statement of permanent preservation is relative. Under good conditions,/kloc-specimens over 0/00 years old are not uncommon. Australia, for example, has kept Darwin's own bird specimens for many years.