Quadrant - a frame, traditionally square used to isolate a standard unit of area for study of distribution of an item over a large area- suitable for sampling plants, slow-moving animals and some aquatic organism Sweep net- a finely meshed net, usually with a round mouth, its advantages lie in its simplicity and speed and its ability to collect relatively dispersed insect species on top of vegetation used for sampling insets from vegetation. Pitfall - a trapping pit for small animals such as insects amphibians and reptiles. Light trap- insects fly into the light bulb, fall down the funnel and are trapped in the can