Marie Read / Blue jay (Cyanocitta cristata) holding an acorn in its bill whilst perched on tree stump, with autumn foliage, New York, USA, October.

Jeff Foott / Maple (Acer sp) leaves and needles in autumn, Acadia National Park, Maine

Jeff Foott / Creek in autumn, Duck Brook, Acadia National Park, Maine

Theo Bosboom / Autum leaves and grass in the current of mountain stream La Hoegne, Belgium.

Theo Bosboom / Autumn foliage including Beech and Oak leaves and Rowan berries floating in the current of a mountain stream, La Hoegne, Ardennes, Belgium.

Theo Bosboom / Underwater view of autumn leaves in stream current, La Hoegne, Ardennes, Belgium.

Theo Bosboom / Underwater view of bubbles and Beech (Fagus sylvatica) leaves Hoegne, Belgium.

Theo Bosboom / Autumn leaves stuck behind branches in the water, Leuvenumse beek, the Netherlands.

Theo Bosboom / Autumn leaves from Beech trees, Oak trees and Birch trees floating under water in the current of a mountain stream, La Hoegne, Ardennes, Belgium.

Theo Bosboom / Underwater view of autumn leaves stuck behind a fallen tree, Leuvenumse beek, the Netherlands.

Theo Bosboom / Autumn leaves seen underwater, Ardennes, La Hoegne, Belgium.

Theo Bosboom / Autumn leaves from Beech, Oak and Birch trees floating on water, taken from underwater, Ardennes, La Hoegne, Belgium.