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One last comment; perhaps two.
I've been reminded of one more cause of ambiguity in these codes, namely th=
e propensity for name changes in bird species. The list I gave was the orig=
inal 1978 version of conflicting codes. Someone reminded me that Yellow War=
bler no longer collides with Yellow Wagtail, because the latter is now call=
ed Eastern Yellow Wagtail, and yellow Warbler has reverted back to followin=
g the rule as YEWA. The correspondent mentioned he liked the old "why-war" =
(YWAR) code better though.
Second point: the discussion on Herring Gull is illustrative of the possibi=
lities for confusion. As Herring Gull and Heerman's Gull are colliders, the=
y were given HERG and HEEG respectively as codes. Cheers, Larry
________________________________
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<p>One last comment; perhaps two. </p>
<p><br>
</p>
<p>I've been reminded of one more cause of ambiguity in these codes, namely=
the propensity for name changes in bird species. The list I gave was the o=
riginal 1978 version of conflicting codes. Someone reminded me that Yellow =
Warbler no longer collides with
Yellow Wagtail, because the latter is now called Eastern Yellow Wagta=
il, and yellow Warbler has reverted back to following the rule as YEWA. The=
correspondent mentioned he liked the old "why-war" (YWAR) code b=
etter though.</p>
<p><br>
</p>
<p>Second point: the discussion on Herring Gull is illustrative of the poss=
ibilities for confusion. As Herring Gull and Heerman's Gull are colliders, =
they were given HERG and HEEG respectively as codes. Cheers, Larry<br>
</p>
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