Funnel Tullgren

The sample is placed in a container with a base made from gauze with a mesh designed to hold soil particles but permit the animals to pass.

The container is arranged over a funnel with a light above. The heat causes the animals to move away from the top of the sample  through the gauze sheet and into the funnel from which they can be collected. Used to extract small invertebrate animals from a dry soil sample.

Most species are collected after two hours  but complete extraction takes two-three days.