An identification key is a tool used to identify organisms by presenting a series of choices in a dichotomous format. The key contains couplets that present two contrasting choices, directing the user down different paths to ultimately identify an organism based on its observable characteristics and features.

1. Identification key
Identification key is a tool to use in identifying organisms. It contains lead and the two
contrasting choices form couplet.
1. Have wing……………………………………………………………………………go to 2
Have no wing……………………………………………………………………….go to 3
2. Have antennae…………………………………………………………………….go to 4
Have no antennae………………………………………………………………..bird
3. Have leg………………………………………………………………………………go to 5
Have no leg………………………………………………………………………….go to 6
4. Have cercus………………………………………………………………………….go to 7
Have no cercus……………………………………………………………………..go to 8
5. Have pedipalp………………………………………………………………………go to 9
Have no pedipalp………………………………………………………………….go to 10
6. Have fin……………………………………………………………………………… Fish
Have no fin………………………………………………………………………….Snake
7. Wings cover body………………………………………………………………….Cockroach
Wings do not cover body……………………………………………………….go to 11
8. Have elytron…………………………………………………………………………..Dung Beetle
Have no elytron………………………………………………………………………Moth
9. Have sting……………………………………………………………………………..Scorpion
Have no sting…………………………………………………………………………Spider
10. Have shell………………………………………………………………………………Crab
Have no shell………………………………………………………………………….go to 12

2. 11. Wings stick out from body………………………………………………………Dragon Fly
Wings do not stick out from body……………………………………………Bee
12. Have fur………………………………………………………………………………..go to 13
Have no fur………………………………………………………………………….Frog
13. Have bushy tail……………………………………………………………………Squirrel
Have no bushy tail……………………………………………………………….Mouse