How does the poem capture the elusive nature of the peacock?

The peacock, as the poet narrates, is not so easy to find. Its elusive nature makes one work really hard to get a glimpse of it. The poet says that she was told that one has to sit in the veranda and read a book, preferably a favourite one, with great concentration. The moment the person begins to live inside the book and forgets about the surroundings, the peacock descends casting a blue shadow over the person. The steady humming of the bees in the nearby bushes will stop, the cat will awaken and stretch. The attention will brake and then one has to look up in time else the peacock will disappear again somewhere for the it is evanescent. Even when one gets to see it once, the peacock runs out of sight quickly gathering its tail.