Yosemite Joseph Grinnell resurvey
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Retired U.C. Berkeley zoology professor Jim Patton scrambles across rocks at 10,150 feet near upper Young Lake as he heads for one of many small mammal traps. Patton, his wife Carol, and Les Chow, a data manager with the National Park Service, are working on the Joseph Grinnell resurvey project at upper Young Lake in Yosemite National Park. The original Grinnell survey was done in 1915. -
Jim Patton picks up a trap he set the day before at upper Young Lake in Yosemite National Park. -
Carol Patton looks into a Sherman Live Trap to see what was caught. -
Jim Patton holds an Alpine chipmunk which he trapped near upper Young Lake. -
Jim Patton clips the ear of a lodgepole pine chipmunk. The ear clipping will be used to check the DNA of the chipmunk. -
Jim Patton picks up a trap he set the day before at upper Young Lake in Yosemite National Park. -
Jim Patton holds a lodgepole pine chipmunk he trapped at upper Young Lake in Yosemite National Park. -
Les Chow, left, data manager with the National Park Service and Jim Patton work on the Joseph Grinnell re-survey project at upper Young Lake in Yosemite National Park. -
An alpine chipmunk hunkers down inside a trap near upper Young Lake in Yosemite National Park. -
Jim Patton, left, and his wife Carol collect vole traps on the edge of upper Young Lake in Yosemite National Park. -
Jim Patton goes over his field information in his camp at middle Young Lake.
