There are many different forms of tagging, one called "pissing" in which one refills a fire extinguisher with paint which allows for tags as high as 20 feet. Because it is such a difficult style, the outcome is usually wavy and sloppy.
It is estimated that in the amazon rainforest alone there between 20-40 million different species of animals, most of which are insects, as well as over 40,000 species of plant!