Archive | August 2017

Science update: Fisher distribution

Our July #SuperSnap was all about fishers, and we’re just going to keep on rolling on the fisher train! This science update was inspired by recent comments on a photo of a fisher in central Wisconsin. The location of the photo might cause confusion if you base where fishers *should* be on the range map we have posted. The map shows fisher range extending to only the very northern part of the state:

FisherMap.jpg

Whereas we’ve seen fishers on Snapshot Wisconsin cameras in counties pretty far south:

Fisher.jpg

In the case of a species like fisher, which was reintroduced to Wisconsin in the 1950s and expanded its range quickly, static distribution maps go out of date quickly. This brings up a larger point about range maps being inaccurate because they are based on old, incomplete or faulty data. We provide range maps to give volunteers an indication of where they are more likely to find a certain species, but these maps are by no means perfect. The fact that we do not have very good statewide data on the distribution of most species is indeed a major reason for starting a project like Snapshot Wisconsin!

Note that the above map shows counties where we’ve seen Snapshot Wisconsin photos correctly classified as fisher. Many of the gray counties do not have any Snapshot Wisconsin cameras and so we do not have any photos there yet. This is not to say there are no fishers in the gray counties!

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July #SuperSnap

This month’s #SuperSnap selection goes to this agile fisher nominated by @Snowdigger:

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Fishers (Martes pennanti) are medium sized mustelids with slinky-like bodies and dark fur. Despite the name, fishers seldom eat fish. Instead, their diets consist of small mammals, and are one of a handful of animals capable of preying on porcupines. Fishers were reintroduced to Wisconsin in the 1950s, and have done well in the state since then – so well, in fact, that Wisconsin fishers have been re-located for reintroduction efforts in other states.

#SuperSnap is a monthly blog feature and a way for us to share some of the best Snapshot Wisconsin photos! Hashtag your favorite photos for a chance to be featured in the next #SuperSnap blog post, and check out all the nominations by searching “#SuperSnap” in Talk.