A green darner dragonfly buzzes over the waters emanating from the base of the knobs in the Cedar Grove wildlife corridor.
Above the spring, a millipede trudges over a mossy log teeming with mushrooms. A few feet away, in the loamy soil of the hillside, Bernheim Arboretum’s Conservation Director Andrew Berry points to the spot where they found a rare cave snail.
Then he dips his fingers into the creek.
“This water is coming out of an aquifer. You can feel it and feel how cold it is,” Berry said.