For the last few decades we've been entertained by a wide variety of birds that either just hang 
around the house or stop by for a few weeks to rest as they make their way along their migratory 
path.Every year we are treated to a visit by dozens (sometimes hundreds) of Bandtail pigeons.  They've 
been stopping here for over 35 years that I know of, and always hang together as a group.  The 
other day I noticed they had a "tagalong".  I had never seen a bird quite like this guy.  It was 
almost as big as a Bandtail but looked like a really big dove in all aspects except the size and 
legs.
Fortunately it stuck around long enough for me to get some pretty good pictures of it.  I looked 
this bird up in Audubon's bird book and was surprised at what I found.  It's a Eurasion Collared 
Dove.  Like said, I had never seen a bird like this before so I checked to see where it ranged.  
This is what I found out:

"Originally a Mideastern species, the Eurasian Collared-Dove has extended its range dramatically into western Europe since about 1930. It was inadvertently released in the Bahamas in the 1970s then spread to South Florida, probably by natural means, in the late 1970s or early 1980s. Florida birds were initially mistaken for feral populations of Ringed Turtle-Dove (S. risora), a domestic cage bird with no natural populations anywhere in the world. This mistake was soon corrected, and the species was officially recognized in the U.S. in the 1990s. It is expanding its presence rapidly north and west, having already reached Georgia, Louisiana and Arkansas; based on European experience, likely to become the "beige Starling" of U.S. avifauna." 

I can now add "Oregon" to the list.