I am not a botanist or biologist, so it would be interesting to get a few more opinions on the matter. I can't find a good answer online. My question is about a spruce tree, a sikta spruce to be more precise. At least I believe it to be a sikta. The tree is completely yellow, but does not appear to be sick. I found the tree while I was on holiday in my home area in the western part Norway (Gulen municipality, Sogn og Fjordane county). The tree is not an indigenous species to Western Norway, but was imported from the western coast of Canada and USA during the 1800. At this point Sikta grows just about everywhere in Western Norway. I have never seen a specimen like this though. Maybe the tree is dying? Maybe it has a mutation? Maybe the tree is yellow due to damages from drought (the weather has been unusually dry and hot since May) ? I have tried to find out why this tree has these unusual characteristics, but so far I have not been able to find a definitive answer. Is the yellow colour of the tree a common phenomena? What do you guys think the explanation for these characteristics is? I have gotten two different answers here in Norway. Nibio, Norwegian Institute of Bioeconomy Research, suggested that the tree is yellow because of a mutation. How ever, I got a different answer from The Department of Geography at University of Bergen. They said it looked like the tree suffered damages due to drought.