NPSpecies

WYNDD has 9 records of fisher occuring in YNP from 1974 - 1994, all of which are questionable (WYNDD 2005). NPSpecies evidence counts list 3 observations with no references or vouchers. If they occur in YNP, they are likely in the northern part of the Yellowstone ecosystem (e.g., WYNDD 2005, Clark et al. 1989, Clark and Stromberg 1987).; Data Source: Doug Keinath-Lead Zoologist-Wyoming Natural Diversity Database

Given reported, though unconfirmed, sightings of fisher in YNP over the past 50 years, they should be considered native if proof of their presence is documented.; Data Source: Doug Keinath-Lead Zoologist-Wyoming Natural Diversity Database

Data Source: Kerry Murphy, YELL Wildlife Biologist

Park Species Data Source: Mark Biel