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Male great spotted woodpecker perching at a woodpeckers roosting hole.
A gaping hole opens into the tree, making the perfect habitat for any wondering wildlife.
pileated woodpecker nest at Vancouver BC Canada
Eastern Screech Owl -  Camouflage in the Wilderness - Chattanooga, Tennessee
Inonotus obliquus, commonly called chaga mushroom, parasitic on birch tree. Fungus, Sterile conk trunk rot of birch. Charcoal-like mass.
A maple with a large hole in its trunk.
A Great Spotted Woodpecker looking for food.
Bark of fallen white ash tree with woodpecker holes. The tree was infested with emerald ash borers, an introduced and invasive beetle that chews the wood under the bark. The borer has killed hundreds of millions of ash trees in North America since its discovery there in 2002.
A close-up view of a tree trunk showing a noticeable holes in the bark. The hole appears to be a natural occurrence, possibly caused by insect damage or decay.
An adult female Crimson Crested Woodpecker is seen on a tree trunk.  There is a baby woodpecker with its head sticking out of the hole in a tree trunk nearby.  The female adult Crimson Crested Woodpecker is looking at her baby chick from a distance.
Bird nest in a tree trunk
tree hollow
Holes in an oak tree trunk, woodpecker nests
A northern flicker clings to a tree trunk with a whole in it in a forest in Maryland.
There are some out-of-focus green leaves on the right-hand side of the tree trunk
Tree and autumn foliage
Hawks, eagles, snakes
A woodpecker has created a hole in the tree.
Bark texture and background of a old fir tree trunk. Detailed bark texture. Natural background
Eurasian nuthatch or wood nuthatch (Sitta europaea) returns to the nest and feeds the chicks , natural habitat, springtime.
Orange-crowned warbler (Vermivora celata) preparing to forage in dried, dead leaves
Animal behavior photography.
Large tree with peeled bark
Italian Alps, Piedmont, Valsesia: Hole in tree trunk, squirrel or bird nest
The stump is overgrown with moss. There are mushrooms growing on the beautiful stump. A close-up of a cutted mossy tree
A northern flicker clings to a tree trunk with a whole in it in a forest in Maryland.
shot of big, beautiful tree with an animal den hole, springtime, Illinois
Swiss pine (Pinus cembra)close-up above Arosa in the canton of graubuenden. The mature size is typically between 25-35 metres.  The species is long-lasting and can reach an age between 500 and 1000 years. The image was captured during winter season.
tree trunk with large holes on path and green plants
Beautiful woodpecker bird, adult male Common flameback, also known as Common goldenback, uprisen angle view, side shot, foraging on the tropical tree trunk in the morning under the clear sky in nature of tropical rainforest, national park in central Thailand.
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