Hi Peter,
Some male House Sparrows have a clearly defined collar too, so it's not
really a mix-up, though possibly an omission from the Tree Sparrow image in
Pizzey. I don't know enough about Tree Sparrows to comment really. I do
know that the ear coverts (the spots) are the best diagnostic feature for
Tree Sparrow.
Regards,
Chris
On 03/10/2007, Peter Shute <> wrote:
> > Thanks, Philip. What do you mean by "incomplete"? Does the collar stop
> > near the back of the neck? If so, would you still be able to see the
> > two half collars if you were observing from above the bird?
> >
> > Getting back to the Pizzey illustrations, I guess it must be a mistake
> > if they typically have it. Can anyone confirm that it's still not shown
> > in Ed. 8?
>
>
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