Actually, the official four-letter code for Spruce Grouse is SPGR. I
don't know what the official code for Spotted Greenshank is, but I
would guess SPOG, as Common Greenshank is COMG, to avoid conflict with
Common Grackle.

Good birding!

Mark Stackhouse
Westwings, Inc.
www.westwings.com
mark at westwings.com
801-487-9453 (Salt Lake City, Utah, USA)
011-52-323-285-1243 (San Blas, Nayarit, Mexico)