Yes, here in the U.S. there are fairly precise listing rules. One thing that
is clearly defined is the geographical territory included within any listing
area, and these take account of biogeography, rather than just nationality.
thus, for example, Hawaii is excluded from the ABA area, which includes the
rest of the United States and Canada, because it is too distinct
biogeographically. Other listing areas are also defined. And yes, David is
right, if you are standing in state A and see a bird that is sitting on a
haystack in state B, for purposes of your state lists, it would count in state
B. Or perhaps more importantly, if you are birding in Texas along the Rio
Grande River, and you see a bird on the other side of the River, it is a Mexico
bird, not a U.S. or ABA area bird.
Of course the ABA rules are only for those who choose to list according to the
ABA guidelines. Many people do not wish to submit their lists to the ABA or
otherwise "compete" in listing and so feel free to alter the rules to suit
their own interests.
Eric Jeffrey
Falls Church, VA
USA
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