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
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
There were two hybrid geese at Sharp Point Ponds in Fort Collins this
morning, near Sharp Point Drive and Prospect. One appeared to be a Snow x
Canada/Cackling [white head of Snow, with larger bill and smile, and body
of Canada/Cackling]; the other appeared to be a Ross's x Cackling (eBirds
