Marie Read / Red-winged Blackbird (Agelaius phoenicus) male singing from snow-covered red maple (Acer rubrum) in flower, Ithaca, New York, USA. April 2020.

John Shaw / Hybrid Poplar tree plantation in autumn (Populs sp.). Boardman Tree Farm, near Irrigon, Oregon, USA. October.

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

Steve Downer / Timelapse of Sycamore tree (Acer pseudoplatanus) leaves developing, UK. March. Controlled conditions.

Jack Dykinga / Western sword fern (Polystichum munitum) and Big leaf maple (Acer macrophyllum) trees that are covered with moss, Hoh Temperate Rainforest, Olympic National Park, Washington, USA. June 2017.

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.

Floris van Breugel / Late fall colors linger among the mossy trees (Acer macrophyllum) in the Hoh Rainforest in Olympic National Park. Washington, USA. November 2012

Floris van Breugel / Emerging spring leaves adorn the mossy trees - Vine Maple (Acer circinatum) and Alder (Alnus rubra) in Mt Baker - Snoqualmie National Forest. Washington. April 2013

Floris van Breugel / Japanese maple (Acer palmatum) leaves floating in a small pond in late autumn in Seattle's Washington Park Arboretum. Washington USA

Lynn M Stone / Sleeping mixed-breed piglet in straw, Maple Park, Illinois, USA

Lynn M Stone / Mixed-breed piglet in straw, Maple Park, Illinois, USA

Lynn M Stone / Mixed-breed piglet in wooden box with sunflowers, Maple Park, Illinois, USA

Pascal Tordeux / Lone Maple (Acer) in a field against cumulo-nimbus and mammatus clouds. Picardy, France, May.

Rolf Nussbaumer / Orange-crowned Warbler (Vermivora celata), adult on autumn leaves of Bigtooth Maple (Acer grandidentatum), Hill Country, Central Texas, USA, November.

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

Marie Read / Red Maple (Acer rubrum) leaves covered with early snow in autumn. Ithaca, New York, USA, October.

Marie Read / Red Maple (Acer rubrum) leaves covered with early snow in autumn. Ithaca, New York, USA, October.

Colin Varndell / Close up of Field maple buds (Acer campestre) Dorset, England, UK February

Lynn M Stone / Portrait of female Doberman Pinscher sitting in yellow maple leaves, Illinois, USA

Jerry Monkman / Man stoking the fire in the sap evaporator of the sugar house at Sugarbush Farm in Woodstock, Vermont, USA, April 2008.

Stephen Dalton / Maple (Acer sp) leaves in autumn

Merryn Thomas / Maple leaves (Acer sp), UK. October 2009.

Laurie Campbell / Norway Maple (Acer platanoides) fallen leaves in autumn, Queen Elizabeth Forest Park, Stirlingshire, Scotland, October

Jack Dykinga / Leaves of Arizona sycamore (Platanus Wrightii) and Bigtooth maple (Acer saccharum grandidentatum) floating on water, South Fork Cave Creek, Coronado National Forest, Chiricahua Wilderness, Chiricahua...

Jack Dykinga / Yucca (Yucca schottii) plants growing amongst Bigtooth maple trees (Acer saccharum grandidentatum) in autumn, Huachuca Mountains, Coronado National Forest, Arizona, USA

Jack Dykinga / Yucca (Yucca schottii) plants growing amongst Bigtooth maple trees (Acer grandidentatum) in autumn, Huachuca Mountains, Coronado National Forest, Arizona, USA

Philippe Clement / Silver / Creek / River maple (Acer saccharinum) leaf in autumn colours, native to eastern North America

Simon Colmer / Field maple tree (Acer campestre) twig and buds in winter, UK

Ross Hoddinott / Field maple leaf {Acer campestre} frozen in ice, Cornwall, UK. October

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

Jack Dykinga / West Fork Oak Creek at base of Supai sandstone cliffs, mixed forest of oak, maple and conifers in background, Coconino National Forest, Arizona

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 / Quaking aspen {Populus tremuloides} and Bigtooth maple {Acer grandindentatum} trees in autumn colours, Mt Timpanogos, Uinta National Forest, Utah, USA

Jack Dykinga / Moss covered trunks of Sitka spruce {Picea sitchensis} and Big leaf maple {Acer macrophyllum}, also Sword ferns {Polystichum munitum} Hoh temperate rainforest, Olympic NP, Washington, USA

Aflo / N-7902 Colouful Autumn maple leaves, Japan

Aflo / N-8307 Waterfall with fallen Autumn maple leaves on surrounding mossy rocks, Japan

Larry Michael / Sugar Maple leaves in water with autumn coloured reflections. USA

Larry Michael / Sugar Maple leaves in water with autumn coloured reflections. USA

Scott Leslie / Red Maple (Acer rubrum) trees and river, Mersey River, Medway Lakes Wilderness Area, Nova Scotia, Canada

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

Kevin Schafer / Pine (Pinus sp) and Japanese Maple (Acer palmatum) trees in autumn, Ginkakuji Gardens, Kyoto, Japan

Tim Fitzharris / Little Pigeon River cascading among rocks and colorful Maple leaves, Great Smoky Mountains National Park, Tennessee

Jim Brandenburg / Maple (Acer sp) leaf in pond, Minnesota

Jack Dykinga / Bigtooth maple (Acer grandidentatum) trees in autumn amongst Douglas fir (Pseudotsuga menziesii), against canyon wall. Kolob, Zion National Park, Utah, USA. October 1995.

Jussi Murtosaari / Red squirrel (Sciurus vulgaris) feeding on Maple (Acer sp) seeds in tree. Jyvaskyla, Central Finland. November.