RE: [cobirds] Mexican Duck on e-bird

All,

 

See the ABA blog for more on lumps and splits from the American Ornithological Society's Committee on Classification and Nomenclature of North and Middle American Birds (whew).

 

http://blog.aba.org/2018/06/aos2018.html

 

The NACC accepts all of ABA's changes, but the AOU goes its own way. I've asked Jon Dunn the question of why so many checklists, and he says they have different goals. Maybe that's a diplomatic way of saying the two groups agree to disagree. If the Colorado Bird Records Committee goes by AOU, then it's not a new bird. If it goes by NACC, it is. It wouldn't be the first time.

 

Mark Miller

Longmont, CO

 

 

From: cobirds@googlegroups.com [mailto:cobirds@googlegroups.com] On Behalf Of Brandon
Sent: Wednesday, August 15, 2018 8:10 PM
To: Christopher Wood <chris.wood@cornell.edu>
Cc: cobirds <cobirds@googlegroups.com>
Subject: Re: [cobirds] Mexican Duck on e-bird

 

The confusing part is, that the AOU checklist committee didn't accept Mexican Duck as a full species (as far as I can tell).  The ABA Checklist committee always follows AOU on split species.  So, I'm thinking that Mexican Duck doesn't count any lists submitted to ABA Listing Central (is that correct)??  So, Mexican Duck can't be added to the Colorado State List, if it isn't a full species, according to AOU. 

 

Brandon K. Percival

Pueblo West, CO 

On Wed, Aug 15, 2018 at 8:04 PM Mark Miller <snowy.owlets@gmail.com> wrote:

Hi Everyone,

 

The 2018 ebird checklist went live today, as did the Clements checklist. Here is the change comment.

 

The monotypic group Mallard (Mexican) Anas platyrhynchos diazi is elevated to species rank as Mexican Duck Anas diazi. Genetic divergence of Mexican Duck from Mallard is at comparable levels to other taxa that are recognized as species, such as American Black Duck Anas rubripes and Mottled Duck Anas fulvigula (McCracken et al. 2001, Lavretsky et al. 2014a, 2014b, 2015); and hybridization between Mallard and Mexican Duck has not been demonstrated to occur at higher levels than between Mallard and other species in the Mallard complex. Revise the range description for Mexican Duck from "S Texas, New Mexico and Arizona south to central Mexico" to "southeastern Arizona, southern New Mexico, and western Texas (Trans-Pecos region) south to central Mexico".

 

Mark Miller

Longmont, CO

 

From: cobirds@googlegroups.com [mailto:cobirds@googlegroups.com] On Behalf Of Brandon
Sent: Wednesday, August 15, 2018 5:47 PM
To: cobirds <cobirds@googlegroups.com>
Subject: [cobirds] Mexican Duck on e-bird

 

 

Did Mexican Duck get split from Mallard??  E-bird seems to think so, so I was wondering, if anyone knows for sure, it is all confusing to me.  If it has, then this will be a new species for Colorado, since there have been more and more Mexican Ducks in the state, in the last several years.

 

From e-bird's Home Page:    If eBird had a subspecies group such as Mallard (Mexican) that was relevant to the new split, then those entries will be upgraded from a subspecies group to the new species (e.g., Mexican Duck). If you did not specify the subspecies, then we try to assign records based on known range and occurrence patterns.  

 

--

Brandon Percival
Pueblo West, CO

 

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Brandon Percival
Pueblo West, CO

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