Indicator

Indicator may refer to:

== Biology == Environmental indicator of environmental health (pressures, conditions and responses) Ecological indicator of ecosystem health (ecological processes) Health indicator, which is used to describe the health of a population Honeyguides, also known as "indicator birds", a family of Old World tropical birds Indicator (genus), a genus of birds in the honeyguide family Indicator species, a species that defines a characteristic of an environment Indicator bacteria, bacteria used to detect and estimate the level of fecal contamination of water Indicator organism, organisms used to measure such things as potential fecal contamination of environmental samples Indicator plant, a plant that acts as a measure of environmental conditions Indicator value, one of two terms in ecology referring to the classification of organisms Iodine–starch test, a method to test for the presence of starch or iodine.