Alan Cressler:
Amnicola species, Hiwassee River, Polk County, Tennessee 1
Alan Cressler:
Cambarus species (female), Hiwassee River, Cherokee National Forest, Polk County, Tennessee 1
Alan Cressler:
Cambarus species, Hiwassee River, Cherokee National Forest, Polk County, Tennessee 1
Alan Cressler:
Cambarus species, Hiwassee River, Cherokee National Forest, Polk County, Tennessee 1
Alan Cressler:
Cambarus species, Hiwassee River, Cherokee National Forest, Polk County, Tennessee 1
Alan Cressler:
Cambarus species, Hiwassee River, Cherokee National Forest, Polk County, Tennessee 2
Alan Cressler:
Cambarus species, Hiwassee River, Polk County, Tennessee 1
Alan Cressler:
Cambarus species, Hiwassee River, Polk County, Tennessee 1
Alan Cressler:
Cambarus species, Hiwassee River, Polk County, Tennessee 2
Alan Cressler:
Campeloma decisum, Hiwassee River, Cherokee National Forest, Polk County, Tennessee 1
Alan Cressler:
Campeloma decisum, Hiwassee River, Cherokee National Forest, Polk County, Tennessee 1a
Alan Cressler:
Colonial Algae, Hiwassee River, Cherokee National Forest, Polk County, Tennessee 1
Alan Cressler:
Colonial Algae, Hiwassee River, Cherokee National Forest, Polk County, Tennessee 2
Alan Cressler:
Colonial Algae, Hiwassee River, Cherokee National Forest, Polk County, Tennessee 3
Alan Cressler:
Colonial Algae, Hiwassee River, Cherokee National Forest, Polk County, Tennessee 4
Alan Cressler:
Colonial Algae, Hiwassee River, Cherokee National Forest, Polk County, Tennessee 5
Alan Cressler:
Colonial Algae, Hiwassee River, Cherokee National Forest, Polk County, Tennessee 6
Alan Cressler:
Corydalus cornutus, Hiwassee River, Polk County, Tennessee 1
Alan Cressler:
Cottus carolinae, and Didymosphenia geminata (Didymo), Hiwassee River, Cherokee National Forest, Polk County, Tennessee 1
Alan Cressler:
Cottus carolinae, Hiwassee River, Cherokee National Forest, Polk County, Tennessee 1
Alan Cressler:
Cottus carolinae, Hiwassee River, Cherokee National Forest, Polk County, Tennessee 1
Alan Cressler:
Cottus carolinae, Hiwassee River, Cherokee National Forest, Polk County, Tennessee 2
Alan Cressler:
Cottus carolinae, Hiwassee River, Polk County, Tennessee 1
Alan Cressler:
Cottus carolinae, Hiwassee River, Polk County, Tennessee 1
Alan Cressler:
Cottus carolinae, Hiwassee River, Polk County, Tennessee 1
Alan Cressler:
Cottus carolinae, Hiwassee River, Polk County, Tennessee 2
Alan Cressler:
Cryptobranchus alleganiensis, Cherokee National Forest, Polk County, Tennessee 1
Alan Cressler:
Cryptobranchus alleganiensis, Cherokee National Forest, Polk County, Tennessee 2
Alan Cressler:
Cryptobranchus alleganiensis, Hiwassee River, Cherokee National Forest, Polk County, Tennessee 2
Alan Cressler:
Cryptobranchus alleganiensis, Polk County, Tennessee 1
