Test your observation skills with this optical illusion challenge! Spot the hidden owl in a pattern of birch trees.

Newborn caterpillars protect leaf-tip homes with buzzing and drumming signals. These vibrations scare off rivals and help avoid fights.

Find Birch Bark Pattern stock video, 4K footage, and other HD footage from iStock. Get higher quality Birch Bark Pattern content, for less—All of our 4K video clips are the same price as HD. Video ...

abstract, natural background closeup selective focus uneven textured surface of birch bark, tree trunk. birch white and black texture pattern in the forest. abstract, natural background. close up.

Daniel Taylor spent decades solving the mystery of the yeti, the hairy, Himalayan cryptid. Following its giant footsteps also ...

V&A bark prototypes One thing Materials ... crops or plants are grown between rows of trees to provide interim income while the trees mature. The key principle across both models is the creation of ...

It feeds on the sap of more than 70 plant species, including cherry trees, apple trees, birch trees, maple trees ... the female lays large batches or rows of 20 to 60 eggs on smooth bark, fence posts, ...

An important component of native woodlands are birch trees. Most people think of white or paper birch (Betula papyifera), ...

The trees exchange carbon dioxide and oxygen with the atmosphere through little “mouths” in their leaves and tiny “windows” ...