 In biology, field research typically involves studying of free-living wild animals in which the subjects are observed in their natural habitat, without changing, harming, or materially altering the setting or behavior of the animals under study.Field research is an indispensable part of biological science.Animal migration tracking (including bird ringing/banding) is a frequently-used field technique, allowing field scientists to track migration patterns and routes, and animal longevity in the wild.