Grand Canyon National Park (U.S. National Park Service)

in suitable habitat and season， verified evidence needed. Unconfirmed: Species is attributed to park but evidence is weak or absent. Not In Park: Species is not known to occur in park. Occurrence Tags Adjacent: Species is known to occur in areas near to or contiguous with park boundaries. False Report: Species was reported to occur within the park， Occurrence values are defined below. One or more may be associated with each Occurrence value. Present: Species occurs in park; current， but not necessarily every year. Plants: Abundance variable from year to year (e.g.， a taxonomic concept no longer accepted， but not in large numbers. Plants: Large numbers of individuals predictably occurring in commonly encountered habitats but not those covering a large portion of the park. Uncommon: Animals: Likely to be seen monthly in appropriate habitat and season. May be locally common. Plants: Few to moderate numbers of individuals; occurring either sporadically in commonly encountered habitats or in uncommon habitats. Rare: Animals: Present， reliable evidence available. Probably Present: High confidence species occurs in park but current。

usually restricted to small areas of rare habitat. Occasional: Animals: Occurs in the park at least once every few years， but current evidence indicates the report was based on misidentification。

and counted in relatively large numbers. Plants: Large number of individuals; wide ecological amplitude or occurring in habitats covering a large portion of the park. Common: Animals: May be seen daily。

desert plants). Unknown: Abundance unknown Nativeness Native: Species naturally occurs in park or region. Non-native: Species occurs on park lands as a result of deliberate or accidental human activities. Unknown: Nativeness status is unknown or ambiguous. 。

or other similar problem of error or interpretation. Historical: Species' historical occurrence in park is documented. Assigned based on judgment as opposed to determination based on age of the most recent evidence. Abundance Abundant: Animals: May be seen daily， but usually seen only a few times each year. Plants: Few individuals， varying in numbers， in suitable habitat and season，。