Determination of Gavia humerus

[Börge Pettersson]

Dear Taxacomers,
I have found a humerus which I beleive is from Gavia adamsii,
White-billed Diver/Loon. It is 202 mm long. Could anybody provide me
with measurements of humeri from G. adamsii and G. immer (Great
Northern Diver/Common Loon) or indicate where to find them in
literature? I suppose that the measurements are overlapping between
the two species. Are there any other diagnostic features to separate
them?
Many thanks in advance,
Börge Pettersson

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  Börge Pettersson
  Swedish Biodiversity Centre
  Box 7007      Tel: +46-18 67 27 44 , +46-70 325 21 69
  SE-750 07 Uppsala, Sweden        Fax: +46-18 67 34 80
http://www.cbm.slu.se/engelska/contact/personalia/borpeteng.htm
                    Visiting address: Bäcklösavägen 10A
                    E-mail: Borge.Pettersson at cbm.slu.se
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