11. The nearby Shooh mountains are covered with 500 hectares of fir trees . 12. It is surrounded by thick forests of pine and fir trees . 13. La Mata de Valencia is the largest Pyrenean fir tree forest. 14. This animal nests almost exclusively in the foliage of Douglas-fir trees . 15. Softwood lumber from pine, spruce and fir trees is used to build homes. 16. Much of the non-planted land is covered by Redwood and Douglas Fir trees . 17. Machine-gun nests and artillery batteries nestle among the fir trees , beneath snow-capped peaks. 18. A Waterloo grower prunes Balsam Fir trees in October, west Waterloo, Nova Scotia. 19. Besides their appeal for tourists, they and Douglas fir trees are logged commercially. 20. In Oregon we grow many large fir trees ; also we have fish .'