Tim Allwood said:try David Sibley's online article John
http://www.sibleyguides.com/canada_cackling.htm
whole thing is a nightmare
Tim
Hi Johnjpoyner said:Any thoughts???
JP
Given the the taxonomic issues regarding the Canada Geese forms I would agree that the Birding World articles should perhaps not be taken as 'gospel'. However the articles are IMHO an excellent guide highlighting the main features differenciating typical individuals of the many vagrant forms.Tim Allwood said:given Sibley's comments about id of these forms, i'm not sure how much faith i'd put in the Birding World articles...
Tim
AStevenson said:Your bird appears to show a chin strap - a feature that has been quoted as good for Taverner's in the past but I believe from the American literature that chin straps can be shown occasionally by other forms??
Andrew
Yes this is quite true, one of the richardson's in D&G this winter showed a broken chin strap and I have vague memories of a Todd's I observed in Norfolk some years ago showing this feature.Birdspotter said:You are right about this feature, the presence of a chin strap is not just seen on taverners.
Birdspotter said:Hi M8,
You are right about this feature, the presence of a chin strap is not just seen on taverners.
The bird I sent shots of in an earlier post to this thread showed one also, which threw me for a while.
As a matter of interest where on Barra was the Todds ?