Wicked is the tale of Elfaba, the " Wicked witch of the west". It takes you from her introduction to the world to her "passing" a child conceived who is GREEN! It is the narrative of her life as she goes to class, meets GAlinda who later turns out to be simply Glinda, finds she has amazingly solid mystical forces, and how she comes to be viewed as an outcast rather than the solid, empathetic young lady she truly is.
This is called a "style"
Rhetoric is the study of speechcraft, diction is the manner of speaking, audience is the receiver of the sent message, and genre is the prototypical group to which the work of art falls into.
The type of evidence that Schlosser uses in this excerpt is anecdotal. By definition, anecdotal evidence is based on stories that may or may not be true but due to lack of hard facts. They are usually based on personal stories. In this case, there is no proof that things mentioned in the excerpt happened the way that they were described.
Well with no picture I can't help, but just describe the birds as you see it! :)