Hi Jim - First best step is to learn about the concept of "species concepts." There are several and wrapping your head around that will be a great start to understanding the "why" in all of this. I'll write more in a bit.
Best
Rob
-;
Rob Faucett
+1(206) 619-5569
robfaucett at mac.com
Seattle, WA 98105
>
On Aug 1, 2024, at 9:50 AM, Jim Betz via Tweeters <tweeters at u.washington.edu> wrote:
>
>
Hi,
>
>
I read with interest the changes in classifications for this year (more?/less?). Among
>
>
them were certain splits - based primarily/substantially upon differences in songs/calls.
>
>
I have often read about song/vocalization changes that happen over time/based upon
>
>
locations - where a grouping of a species is known to be "evolving a new vocalization
>
>
change". And I had to wonder ... ? And also where a given population is know to
>
>
have a different set of songs/calls than another population of 'the same species'.
>
>
Similarly, this year as always, there are some changes that combine what was
>
>
previously recognized as more than one species into just one (Redpolls, this time).
>
>
>
Why aren't vocalizations of relatively less importance than they seem to be when
>
>
organizations such as the AOS are making decisions about species classifications.
>
>
Or, more importantly, why isn't DNA more important than anything else when it
>
>
comes to bird classification?
>
>
>
Let me give a non-birding example ... in the arena of Killer whales there are very
>
>
distinct differences such as whether or not the pod travels long distances or
>
>
stays in one specific area. Yet, they are all considered to be the same species.
>
>
Here's another example - when talking about an individual species of birds
>
>
in a local area and at the same time of year/stage of breeding ... we recognize
>
>
that there can be huge differences from individual to individual in terms of
>
>
the coloring (both locations and 'intensity') and the calls/songs ... yet they are,
>
>
for example, both/all Red-tailed Hawks.
>
>
>
I'm asking ... why isn't this approach taken for birds?
>
>
- Jim
>
>
_______________________________________________
>
Tweeters mailing list
>
Tweeters at u.washington.edu
>
http://mailman11.u.washington.edu/mailman/listinfo/tweeters