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I worked with Scott LaPoint to study suburban fishers in Albany, NY.  We used a new high-resolution tracking collar to learn exactly where these fishers were going, and build dynamic brownian bridge home ranges.  These data allowed us to identify Animal Defined Corridors, showing how individuals moved between core feeding areas. We also asked – Why fishers in the east are doing so much better than in the west?  We discovered that they face fewer predators in the east, eat larger prey in the east, and have evolved larger skull sizes to deal with this. All this suggest eastern fishers are benefiting from mesopredator release.  As a punctuation point on their recover in the east, I reported on the first record of a fisher in New York City when a male was photographed in the Bronx in 2014.

fisher tracks







During this field work in 2011 I also wrote blog posts for the New York Times, which are listed below.

Albany’s Urban Weasels


Scientists track fisher behavior in urban and wild settings to better understand the success of weasel populations in the northeast.


Predators Get Snowed In Too


In deep snow, predators lilke fishers and foxes are less active in the forests near Albany, N.Y.


Following in the Footsteps of a Suburban Fisher


Data from a GPS collar show the exact paths followed by a fisher, paths that a researcher can follow later.


More Animals Found in Urban Forests


Camera traps show more and more varied animal life in suburbia than in wild forests.

Tracking Urban Fishers Through Forest and Culvert


Fishers in urban areas love to travel through culverts.


The Silence of the Fishers


Many people claim to have heard fishers scream. But researchers have found no evidence that they do.


When a Fisher Goes Missing


While looking for one radio-collared fisher, researchers near Albany, N.Y., receive news about another that had set out to find a territory of his own.


Fisher Tracks Through Suburbia


Scientists study a male fisher that lives in the Albany suburb of Latham.


Do Fishers Really Eat Cats?


A zoologist considers the evidence for and against the popular notion that fishers prey on cats.


Fishers With Personality?


In a new “personality” test, scientists examine whether suburban fishers are more likely than the large weasels in wilderness areas to approach novel objects and potential food sources.

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