Re: [cobirds] hybrid geese

birdhybrids.blogspot.com has some fairly extensive discussion of waterfowl hybrids, with contributions from a number of Colorado birders.  See, for example, http://birdhybrids.blogspot.com/2014/02/rosss-goose-x-cackling-goose.html or http://birdhybrids.blogspot.com/2014/02/snow-goose-x-cackling-goose.html .  The identifications in these examples are based on observed morphological details, not DNA.

Along these lines, in our area a dark-bodied goose with a whitish head/neck is much more likely to be a hybrid than a dark morph Snow or Ross's.  I have appreciated the kind guidance of eBird reviewers and other experts in reminding me about this!

Peter Ruprecht

Superior

On Mon, Dec 7, 2020 at 11:17 AM Derek Hill <derekthehill@hotmail.com> wrote:

There is, as to be expected, an influx of goose reports for our state. Via ebird, there are incoming reports of the gamut: cacklingXross's, cacklingXsnow, canadaXsnow, canadaXross's, snowXross's.

How are these hybrids being specifically identified? Can anyone share some data or research of hybrids of known parental provenance that would aid or even remotely make possible these identifications?

Good birding,

Derek Hill

Loveland, CO

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