“So Sylvy knows all about birds, does she?” he exclaimed, as he looked round at the little girl who sat, very demure but increasingly sleepy, in the moonlight. “I am making a collection of birds myself. I have been at it ever since I was a boy.” (Mrs. Tilley smiled.) “There are two or three very rare ones I have been hunting for these five years. I mean to get them on my own ground if they can be found.” “Do you cage ’em up?” asked Mrs. Tilley doubtfully, in response to this enthusiastic announcement. “Oh no, they’re stuffed and preserved, dozens and dozens of them,” said the ornithologist, “and I have shot or snared every one myself. I caught a glimpse of a white heron a few miles from here on Saturday, and I have followed it in this direction. They have never been found in this district at all. The little white heron, it is,” and he turned again to look at Sylvia with the hope of discovering that the rare bird was one of her acquaintances. In at least 150 words, explain what the hunter and the white heron symbolize in “A White Heron,” and how the relationship between these two concepts is developed in this excerpt.