European tree frog (Hyla arborea) sitting on a tree trunk, close-up

Close-up of Harris's Hawk (Parabuteo unicinctus) on tree stump

Close-up of a European beech or common beech (Fagus sylvatica) tree-trunk in a forest in spring.

Close-up of Eurasian Three-toed Woodpecker (Picoides tridactylus) perching on tree trunk, Bavarian Forest National Park, Bavaria, Germany

Young snow leopard lying on tree trunk

Yellow-throated Marten (Martes flavigula) on tree trunk

Charsas (Martes flavigula) on tree trunk, front view

Yellow-throated Marten (Martes flavigula) on tree trunk

Close-up of Grey wolf (Canis lupus) standing in forest

Eurasian Three-toed Woodpecker (Picoides tridactylus) perching on tree trunk, Bavarian Forest National Park, Bavaria, Germany

Great Cormorant or Great Black Cormorant (Phalacrocorax carbo) sitting on a tree trunk, Germany, Europe

Northern raccoon (Procyon lotor) climbing on tree

Close-up of flower growing on tree trunk

Close-up of Hoopoe (Upupa epops) perching on tree trunk

Close-up of Hoopoe (Upupa epops) perching on tree trunk

Close-up of pecker in tree hole

Close-up of Green Woodpecker (Picus viridis) bird perching on tree trunk

Close-up of sap buckets on tree trunk, Ecomusee de la Grande Lande, France

Close-up of Variable Oysterling (Crepidotus variabilis) growing on tree trunk, Schleswig-Holstein, Germany

Close-up of mature woman resting against tree

Lacerta bilineata, close-up

Lacerta bilineata, close-up

Close-up of Tree sparrow (Passer Montanus) on tree stump

Close-up of flower blooming on tree in forest, Costa Rica

Digital composite of nature

A man looking into the branches of a large tree

Low section view of a man holding a tin can

Close-up of a dollar sign on a tree with a Euro sign and an axe on the ground

A Mei long curls up beside the roots of a tree to shelter from the rain

View of leaves in bubbles (digital composite)

Close-up of hornet nest in birdhouse on tree trunk