Joanna and Rush Taylor wrote: > Why does Black-throated Green go under the initials BTNW? I have > seen this before and am puzzled. I should think BTGW would be > more helpful. > > Joanna Taylor > Arlington, VA There's a good reason. What would the Black-throated GRAY Warbler's code be? This is one of a number of codes which if they followed the usual rule would result in two or more birds with the same code. Another example would be Cedar Waxwing and Cerulean Warbler. Tony Futcher Takoma Park, MD -- ----------------------------------------------------------------------- Anthony G. (Tony) Futcher, Ph.D. e-mail: tfutcher@cuc.edu Director of Records, Columbia Union College fax : 301-891-4121 Takoma Park, MD 20912 office : 301-891-4119 -----------------------------------------------------------------------