Insect Identification
Insect Identification Facebook Logo
Insect Identification

Dichotomous Key (Separating Arachnida from Insecta)

Authored By Staff Writer | Last Updated: 11/11/2015

Separating insects from spiders through a series of simple questions.


Our two point Insect Dichotomous Key can assist in identifying between an insect and a spider. Beginning with Question #1, determine which statement ("a" or "b") is true for the insect in question. From there, simply follow the directions at the end of the true statement until you arrive at your identification destination. From there, visit our list pages to specifically identify your insect.

Question 1.

a. Subject has eight legs - YES, go to the Arachnid Key
b. Subject has six legs - YES, go to Question #2

Question 2.

a. Subject has wings - YES, go to the Winged Insect Key
b. Subject does not have wings - YES, go to the Wingless Insect Key

BugFinder - Insects by Color or State
BugFinder allows for a quick search of the database by selecting primary color, secondary color, number of legs and the territory or state in question. If only one Primary color is present, select it again for Secondary color.
Primary Color:
Secondary Color:
Number of Legs:
General Category: