It depends on how you define "sleep," but trees do relax their branches at night, which might be a sign of snoozing, scientists said. In the only reported study to look at tree siestas ...

There is a tree in Somalia that’s unusually leafless all year round, even when it rains. With no other trees growing nearby, it stands more than seven feet tall on a dry and stony patch of land.

Trees "Sleep" At Night Too. Almost all organisms are ruled by the day/night cycle of Earth. In humans, and many other mammals and birds, this is dominated by periods of wakefulness and sleep.

Many plants, including trees, angle their leaves towards the sunlight through the day with the help of this effect. At night, without sunlight, the energy needed to do this is no longer generated ...

Focusing on two common street trees—the Japanese pagoda and green ash tree—at 30 sites spaced apart among main roads illuminated at night, the researchers measured brightness and collected leaves.

"The changes are not too large, only up to 10 cm for trees with a height of about 5 meters,” co-author Eetu Puttonen of the Finnish Geospatial Research Institute said in a press statement ...

A leafless tree exploded into a burst of colour after being overrun by hundreds of parakeets yesterday. A huge swarm of the bright green birds appeared just like leaves in two chestnut trees above ...