Alan Cressler:
Algae, Collins River, Grundy County, Tennessee 1
Alan Cressler:
Cambarus rusticiformis, Collins River, Grundy County, Tennessee 1
Alan Cressler:
Cambarus rusticiformis, Collins River, Grundy County, Tennessee 2
Alan Cressler:
Cambarus rusticiformis, Collins River, Grundy County, Tennessee 3
Alan Cressler:
Etheostoma akatulo (left), and Etheostoma etnieri (right), Collins River, Grundy County, Tennessee 1
Alan Cressler:
Etheostoma akatulo, Collins River, Grundy County, Tennessee 1
Alan Cressler:
Etheostoma basilare, Collins River, Grundy County, Tennessee 1
Alan Cressler:
Etheostoma basilare, Collins River, Grundy County, Tennessee 1
Alan Cressler:
Etheostoma etnieri, Collins River, Grundy County, Tennessee 1
Alan Cressler:
Etheostoma etnieri, Collins River, Grundy County, Tennessee 2
Alan Cressler:
Etheostoma etnieri, Collins River, Grundy County, Tennessee 3
Alan Cressler:
Nothonotus starnesi, Collins River, Grundy County, Tennessee 1
Alan Cressler:
Nothonotus starnesi, Collins River, Grundy County, Tennessee 2
Alan Cressler:
Cambarunio simus, Collins River, Grundy County, Tennessee 1