Askar Isabekov has merged data from different birdwatching websites on the Birds of Northern Eurasia portal. This database allows to monitor appearing new pictures and observations of various bird species in several countries of Northern Eurasia, including Short-toed Eagles. At least 3 out of currently 12 regional sites were mentioned on HoverOverUs before.
Posts tagged ‘geographic variation’
Another subspecies of Short-toed Eagle determined
Nov 30, 2017 / CommentQuite many articles dedicated to Short-toed Eagle are reprsented on the ResearchGate and not yet described on our site. Currently, we’d like to mark one, which is very fresh, raising a topic of georgaphic variations at the farthest border of the species range /map/ and questioning again the concept of Circaetus gallicus as a monotypic species:
• Shengrong Nathaniel NG, Les CHRISTIDIS, Jerry OLSEN, Janette NORMAN, Frank E. RHEINDT, 2017 – A new subspecies of Short-toed Snake-eagle from Wallacea determined from morphological and DNA comparison // Zootaxa, Vol. 4358, No. 2: pp. 365–374. (En).
The abstract of the paper available now is of great interest itself.
G.P. Dementiev’s description of C. gallicus heptneri
May 31, 2010 / Comment
We would like to present a work of Georgiy Petrovich Dementiev published in 1932 in Ornothologische Monatsberichte:
• G. Dementiew, 1932 – Bemerkungen über die geographische Variation des Schlangenadlers [Comments about the geographic variations of Short-toed Eagles] // Ornothologische Monatsberichte, Bd.40, № 6, S.172-173. (De).
This work was dedicated to geographical variations of Short-toed Eagle. The Circaetus gallicus heptneri subspecies was described in the article. It is more often considered now as a clinal variation, but however the article is still of interest and therefore it has been translated to English and to Russian with help of our friends.