John Shaw / Pine tree (Pinus sp) in winter, Bryce Canyon National Park, Utah, USA, January.

Jeff Foott / Jeffrey Pine (Pinus jeffreyi), Incense Cedar (Calocedrus decurrens) and ferns, Yosemite National Park, California

Jeff Foott / Great Basin Bristlecone Pine (Pinus longaeva) trees, Great Basin National Park, Nevada

SCOTLAND: The Big Picture / Ancient Scots pine (Pinus sylvestris) amongst flowering Common heather / Ling (Calluna vulgaris). Rothiemurchus Forest, Cairngorms National Park, Scotland, UK.

Bernard Castelein / Scots pine tree (Pinus sylvestris) at sunrise, Klein Schietveld, Brasschaat, Belgium. September.

Bernard Castelein / Scots pine trees (Pinus sylvestris) in wetlands at dawn with the moon, Klein Schietveld, Brasschaat, Belgium

Bernard Castelein / Scots pine trees (Pinus sylvestris) on island in wetlands, Klein Schietveld, Brasschaat, Belgium

Bernard Castelein / Scots pine tree (Pinus sylvestris) with sunrays at sunrise. Klein Schietveld, Brasschaat, Belgium.

Bernard Castelein / Scot's pine tree (Pinus sylvestris) at dawn, Klein Schietveld, Brasschaat, Belgium, October 2013.

Sylvain Cordier / Monarch butterfly (Danaus plexippus), wintering from November to March in Oyamel pine forests (Abies religiosa) Monarch Butterfly Biosphere Reserve, Mexico.

Tim Fitzharris / Western Juniper (Juniperus occidentalis) and Jeffrey Pine (Pinus jeffreyi) trees, Phipps Peak, Eldorado National Forest, California

Jack Dykinga / Agave (Agave utahensis) close up of spines with Pinyon pine cone (Pinus edulis) wedged amongst them. Grand Canyon-Parashant National Monument, Arizona, USA