Date: 2/21/17 12:18 pm From: Matthew G Hunter <matthewghunter...> Subject: [obol] Reedsport Hummers
I was curious to look at Tim Gannon's short-tailed hummingbird that Paul and Karen have commented on (https://www.flickr.com/ photos/141358197@N06/albums/72157676957687094/with/32876336181/). I believe this is a short-tailed Anna's Hummingbird. Here is a photo of a similarly configured Anna's Hummingbird taken by Joshua Little just a few days ago over at Salishan (part of their Brown Thrasher expedition):
Note that Joshua's bird looks fairly petite, and appears to have a short tail compared to the wingtips. However, it has all other features typical of Anna's Hummingbird, including a nice continuous dark line from eye to bill (goes from thick to thin), a noticeable "forward pale eyebrow," and long even-skinny-width primaries. Tim Gannon's bird has these features as well. Here's another recent one from near Milton-Freewater with wingtip about equal to tail (ignore the out of place left wing): https://macaulaylibrary.org/asset/48701521#_ga=1.176203941.1629333466. 1456037604
A female Calliope Hummingbird would show a broken (dark then pale) area between eye and bill, typically no pale forward eyebrow, and broad and more curved primaries toward the tip.
I don't know if these short-tailed Anna's are immature birds or molting females, or both---maybe someone else can see something in the photos to indicate age/sex---but they are not uncommon.
The following short notes don't directly address the Anna's/Calliope comparison, but may be of use in studying these species in more detail: