1.   Fir tree needles capture acid droplets from low cloud, drawing it into the soil.

2.   Fir needles grow in single file rows up the twigs.

3.   Fir needles are flat and cannot be rolled.

4.   Some were hidden by shadow, some by fir needles, some by a fallen tree limb.

5.   Spruce needles are square and hurt if you grab them, while fir needles are flatter and softer.

6.   Spruce and fir needles also yellow and drop with age, but these trees retain their needles for several years, so needle drop is often not noticeable.

7.   The edge of the course was marked with colored marks and pieces of fir tree needles.

8.   Then, while visiting an ostrich farm in Denmark, he realized that the huge birds eat weeds but avoid the prickly fir needles.

9.   While visiting an ostrich farm in Denmark, he realized that the huge birds eat weeds but avoid the prickly fir needles.