i. Quadrant
ii. Sweep Net
iii. Pooter
iv. Depth Guage

i. Quadrant: for sampling/determining population size frequency and density of a species.

ii. Sweep Net: for catching/collecting insects

iii. Pooter: for sucking in tiny/minute insects and other animals from tree barks, leaf and rock surfaces.

iv. Depth Guage: for measuring depth of water in an aquatic habitat.

Copyright warnings! Do not copy.