These are plant or animal species existing in such small numbers that they are in danger of becoming extirpated; this includes species that are in jeopardy as a result of human activity. A principal factor in the endangerment or extirpation of a species is the destruction or pollution of its native habitat. Other factors include overhunting, intentional extermination, and the accidental or intentional introduction of alien or invasive species that outcompete the native species for environmental resources.
- Endangered, Threatened and Extirpated Species of Indiana by County
- Endangered, Threatened, and Extirpated Plants of Indiana
- Endangered, Threatened, and Extirpated Arachnids and Insects of Indiana
- Indiana Endangered Fish & Wildlife List (Division of Fish & Wildlife)
A plant species believed to be native to Indiana with five or fewer occurrences in Indiana or that is otherwise currently at the brink of extinction.
A plant species believed to be native to Indiana with six to 20 occurrences in the state, or that is of conservation concern, or that is otherwise likely to become endangered within the foreseeable future.