Coniferous trees because they can stay green all year long. Taiga biome are usually cold and coniferous trees never lose it’s color or leaves.
It would be pictorial data cause historian's use historical pictures.
There
are many ways to estimate ground squirrel numbers. The most common
and popular monitoring technique is the combination of electronically
recorded stress calls and visual counts where ground squirrels
respond physically, vocally or both. You simply count the number of
squirrels in a 100m by 100m area that respond to a hand-held
imitation ground squirrel call tool.
<span>I
hope this helps, Regards.</span>
