Theo Bosboom / Maple leaf in autumn, viewed from underwater with bubbles and foam of mountain stream, La Hoegne, Ardennes, Belgium.

Andres M. Dominguez / Great grey shrike (Lanius meridionalis) perched on a branch of Montpellier maple (Acer monspessulanum). Sierra de Grazalema Natural Park. southern Spain. December.

Ross Hoddinott / Maple leaves backlit on lightbox, Broxwater, Cornwall, UK. November 2013.

Rolf Nussbaumer / Jumping Spider (Salticidae) perched on Bigtooth Maple leaf (Acer grandidentatum). Lost Maples State Park, Hill Country, Central Texas, USA, November.

Jack Dykinga / Blue Hen Falls with Sugar Maples (Acer saccharum) and American Beech trees (Fagus grandifolia), Cuyahoga Valley National Park, Ohio

Jack Dykinga / Autumnal Bigtooth Maples (Acer saccharum grandidentatum), West Fork Oak Creek, Coconino National Forest, Arizona

Jack Dykinga / Red and Yellow coloured Bigtooth Maples (Acer saccharum grandidentatum) in Autumn, West Fork Oak Creek, Coconino National Forest, Arizona

Jack Dykinga / Yucca {Yucca schottii} and Bigtooth maples {Acer grandidentatum} in autumn colours, Huachuca mountains, Coronado National Forest, Arizona, USA

Andres M. Dominguez / Goldcrest (Regulus regulus) perched on maple, Ordesa y Monte Perdido National Park, Huesca, Spain, October.

Paul Williams / North American porcupine (Erethizon dorsatum) with a maple syrup tapping tube. These tubes are used to carry sap to large tanks. Porcupines have learned to bite the tubes so that they can drink the li...

Paul Williams / North American porcupine (Erethizon dorsatum) with a maple syrup tapping tube. These tubes are used to carry sap to large tanks. Porcupines have learned to bite the tubes so that they can drink the li...

Paul Williams / North American porcupine (Erethizon dorsatum) with a maple syrup tapping tube. These tubes are used to carry sap to large tanks. Porcupines have learned to bite the tubes so that they can drink the li...