Air Sac – A structure on the male sage-grouse ‘s chest that inflates during lekking displays.
Brooding – A behavior in which parents warm nestlings or young that cannot maintain their own body temperatures.
Candidate Species – A species that will be or is being considered for listing as endangered or threatened under the Endangered Species Act.
Conservation Strategy – An approach for protecting a particular species, habitat or ecosystem.
Diversity – Variety or a range of different things.
Ecosystem – A biological community of interacting organisms and their physical environment.
Endangered Species – A plant or animal that is in imminent danger of extinction throughout all or a significant portion of its range.
Endangered Species List – A list of plants and animals that are in danger of becoming extinct that is maintained by the United States Fish and Wildlife Service (USFWS) as required by the Endangered Species Act. The act’s primary goal is to prevent the extinction of imperiled plant and animal life and, secondly, to recover and maintain those populations by removing or lessening threats to their survival.
Extinction – When the last individual of a species dies.
Filoplume - Feathers that extend over the male sage-grouse's head and are used in the Gunnison Sage-Grouse's lekking display.
Forb – An herbaceous plant that is not a grass.
Fragmented Habitat – Breaks in a species’ preferred living area. The fragmentation is usually a result of human action, as, for example, the clearing of forest or grassland for agriculture or residential development.
Habitat – Place where an animal normally lives or where individuals of a population live.
Historic Habitat – Areas where viable populations have not occurred within five years or more.
Invasive Plants – A non-native introduced plant that has a negative effect on habitats.
Lek – An area where male sage-grouse display for the purpose of gaining breeding territories and attracting females. These arenas are usually open areas with short vegetation within sagebrush habitats, usually on broad ridges, benches, or valley floors where visibility and hearing acuity are excellent.
Obligate – Totally dependent on another species or a certain habitat for survival.
Predator – An animal that lives by killing and eating other animals.
Range – The geographic area or spatial distribution in which a species is normally found.
Sagebrush – A shrub that has silver-grey leaves, yellow flowers and grows in arid sections of the western United States and Canada.
Steppe – A Russian word meaning treeless plain or a non-forested region dominated by grasses and low shrubs.
Warranted but Precluded – A species that merits listing under the Endangered Species Act, but is not listed because other species are present a more urgent priority for listing. A "warranted but precluded" finding is automatically recycled back through the 12-month process indefinitely until a result of either "not warranted" or "warranted" is determined. The agencies monitor the status of any "warranted but precluded" species.