Mike Potts / 'World's Loneliest Tree' a Sitka spruce (Picea sitchensis) which is over 200km from nearest tree (Auckland Islands) Campbell Island New Zealand Sub-Antarctic Islands UNESCO World Heritage Site, March...

Nick Garbutt / Mixed coniferous forest with Red cedar (Thuja plicata), Sitka spruce (Picea sitchensis), Western hemlock (Tsuga heterophylla) Great Bear Rainforest, British Columbia, Canada. September 2007.

Nick Upton / Sitka spuce (Picea sitchensis) plantation interior with many fallen, re-grown, moss-covered trees, Davidstow Woods, near Bodmin Moor, Cornwall, UK, April

Nick Upton / Sitka spuce (Picea sitchensis) plantation interior with many fallen, re-grown, moss-covered trees, Davidstow Woods, near Bodmin Moor, Cornwall, UK, April

Charlie Summers / Large Black Bear (Ursus americanus) high in a Sitka Spruce tree (Picea sitchensis), alongside Anan Creek, Alaska, July.

Chris Mattison / Sitka spruce (Picea sitchensis) cone lying on Hair moss (Polytrichum commune) Peak District, England, UK. July.

Chris Mattison / Sitka spruce (Picea sitchensis) cones, one gnawed by a squirrel, lying on hair moss (Polytrichum commune) Peak District, England, UK. July.

Eric Baccega / Bald eagles (Haliaeethus leucocephalus) perched in a Sitka spruce (Picea sitchensis) Khutzeymateen Grizzly Bear Sanctuary, British Columbia, Canada, June.

Konrad Wothe / American Bald eagle (Haliaeetus leucocephalus) in Sitka spruce (Picea sitchensis) Alaska, USA, July

Konrad Wothe / Sitka spruce (Picea sitchensis) trees covered in lichen, temperate rainforest, Hoh Rainforest, Olympic National Park, Washington, USA, August

Matthias Breiter / Sitka Spruce (Picea sitchensis) tree trunks covered in moss, Kodiak, Alaska

Matthew Maran / Sitka spruce (Picea sitchensis) close up of needles, Wild Pacific Trail, Vancouver Island, Canada