1. Insect specimen: Insect specimen is one of the most common pest specimens, including many insects harmful to human beings, such as mosquitoes, flies, spiders, cockroaches, etc.

2. Spider specimens: Some laboratories specialize in preserving spider specimens, especially poisonous spider specimens. These specimens are usually preserved with preservatives such as alcohol or formaldehyde.

3. Ant specimens: Some laboratories also keep ant specimens, including some scar ants, red imported fire ants and some poisonous ants, which are usually preserved with preservatives such as alcohol or formaldehyde.

4. Shell specimens: including some clams, snails, crustaceans, etc. , usually preserved in a dry way.

5. Other specimens: such as centipede, toad, snake and other animal specimens, and some laboratories also keep them.

Pest specimens are usually used in laboratory teaching and research to study their morphology, structure, function, physiology and ecology. In addition, they can also be used to detect the species and density of pests and analyze the genetic variation of pests.