Spreading Lepidoptera (Butterflies & Moths)

• Report rights infringement
• published: 06 Aug 2012
• views: 14212

Butterflies and moths have unique patterns on both forewings and hind wings. Therefore it is essential to properly pin these specimens so the patterns on the wings can easily be seen. To do this, both forewings and hind wings need to be spread open and laid flat. In some cases grasshoppers and other insects will have unique patterns that are also helpful in identification and at least the left side should be spread. Butterflies can be spread facing upward or downward depending on the features you want to see. The following are steps in spreading a butterfly upside down on a spreading block. Before you begin spreading you must first pin the specimen through the center of the thorax leaving at least 10 mm from the top of the pin to the body of the specimen. Both moths and butterflies are pinned through the center of the thorax. A, position before starting to raise the wings; B, raise the front wingon one side using a small (00) pin; C, raise the front wing on the other side so it is even with the other; D, raise the hind wing on one side, then press the paper strip tight against the wing using thick pins (#3); E, raise the hind wing on the other side so it is even with the other, then press the paper strip down; F, position the antennae with pins in front of the body. G, once the specimen has dried for at least 24 hours, you can remove the pins and paper strips. Use your soft forceps to hold the wings down while removing the pins to avoid breaking the delicate wings.