There seems to be some confusion as to what I was asking in this post. Instead of "What about the junco would keep you interested in looking at it after you have ascertained what it is?," I should perhaps have worded it as "What is interesting about the Junco's behavior?" Since all the answers I got merely state that people like to observe birds' behavior, which I thought was implied in the question in the first place.
Jason Hernandez
Bremerton
jason.hernandez74 at yahoo.com

Date: Sun, 13 Dec 2015 05:52:11 +0000 (UTC)
From: Jason Hernandez <jason.hernandez74 at yahoo.com>
Subject: [Tweeters] Junco of the winter
To: Tweet Ters <tweeters at u.washington.edu>
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I confess, I am not one of those birders who is interested in every bird. Some birds tend to bore me. But I know this is an error of perception on my part; that if I could learn to see them aright, the "boring" birds would have their lessons to teach, too.
I write now of our common companion of this time of year, _Junco hyemalis_ (literal translation, "Junco of the winter"). Of course I know about the geographical subspecies, and the excitement a birder in the know would feel at seeing one of these subspecies in an area properly the domain of another. But suppose you and the juncos are being homebodies -- i.e. you are staying in your own home area, and seeing only the junco subspecies typical of your own home area. What about the junco would keep you interested in looking at it after you have ascertained what it is?
Jason Hernandez
Bremerton
jason.hernandez74 at yahoo.com