HI:
The latest issue of Birding magazine has these articles that might be of interest:

1) No place like home: molt in the Calliope Hummingbird. By Donna Dittman and Dennis K. Demcheck.

2) Variation in Red-naped and Yellow-bellied Sapsuckers. By Steve Mlodinow, Jessie H. Barry, and Cameron D. Cox.

see: http://www.americanbirding.org/pubs/birding/archives/ for details.
--
Ian Paulsen
Bainbridge Island, WA USA
A.K.A.:Birdbooker
\"Rallidae all the way!\"