If the question is Rick Romea's original interpretation (i.e., the most
common bird in Washington) would you base the answer on numbers or total
biomass? If biomass, Mallards, Canada Geese, or maybe even Ruffed Grouse
might be a good bet. If numbers, I think I'd guess one of the sparrows
(Junco, perhaps?), finches (Pine Siskin, or Cassin's?), or maybe American
Robin. If you want to include migrants, then it's a really hard question to
answer.

Kelly Cassidy