I've just posted the latest installment of what, when completed, will
hopefully be a helpful and comprehensive article, with photos, on "Cackling
Goose - Canada Goose Subspecies Identification Indicators: The
'Whtie-cheeked Goose' Challenge with Pictures" dealing with all the
currently recognized eleven subspecies.

http://www.idahobirds.net/identification/identification.html

This new portion deals with the difficult parvipes vs. taverneri id problems
(that Bruce Deuel has done some good work on in his upcoming article in
Western Birds, Vol. 35, #3). I also have a previously completed portion on
B. h. hutchinsii as well as a now complete section on B. h. minima already
posted on the site. Eventually all 11 subspecies will be covered with photo
illustrations of "id indicators". (I think you will find the close-up
picture of B.h. minima, B. h. hutchinsii, and B. c. parvipes together in the
wild at Moses Lake, WA especially instructive.)

This is a work in progress, and I do invite comments (and photos) as you may
see fit to help us all better sort out this often thorny id challenge that
has "magically" risen to the forefront since this summer's AOU "split
decision"...while we continue to make everyone more aware of the wonderful
world of the subspecies. I can definitely always use more close-up pictures
of B. h. taverneri, B. h. leucopareia, and the larger Canada's, B. c.
canadensis, B. c. interior, B. c. maxima, B. c. occidentalis, and B. c.
fulva.

Harry Krueger
Boise, ID
Secretary, Idaho Bird Records Committee
Regional Editor, Idaho-Western Montana Region, North American Birds