Steve Gettle / Black Bear (Ursus americanus), Great Smoky Mountains National Park, North Carolina

Floris van Breugel,Floris van Breugel / Tent at night surrounded by Fireflies (Photinus carolinus) Great Smoky Mountains National Park, Tennessee, USA, June 2013.

Kirkendall-Spring / Canopy of autumn trees and rising fog viewed from Webb Overlook along the Newfound Gap Road in Great Smoky Mountains National Park, North Carolina, USA, October 2008

Tim Fitzharris / Little Pigeon River cascading among rocks and colorful Maple leaves, Great Smoky Mountains National Park, Tennessee

Tim Fitzharris / Autumn leaves on wet boulders in stream, Great Smoky Mountains National Park, North Carolina

Tim Fitzharris / Roaring fork river, Great Smoky Mountains National Park, Tennessee

Tim Fitzharris / Autumn leaf on boulder, Little River, Great Smoky Mountains National Park, Tennessee

Jim Brandenburg / Cascading stream, Great Smoky Mountains National Park, North Carolina

Steve Gettle / Millipede (Narceus americanus) in defensive posture, Great Smoky Mountains National Park, North Carolina

Steve Gettle / Summer Tanager (Piranga rubra) sub-adult male, Great Smoky Mountains National Park, North Carolina

Steve Gettle / Tree Swallow (Tachycineta bicolor), Great Smoky Mountains National Park, North Carolina

Steve Gettle / Cascading creek, Great Smoky Mountains National Park, North Carolina