The compilation of the annual gallery for 2017 has been finished. Photos taken in Northern Ukraine depict well-known and new individuals of the monitored pairs. Only 36 out of thousands of pictures taken with the main purpose to regularly identify local Short-toed Eagles individually have been selected for the represented gallery.
Posts tagged ‘plumage’
Quite 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.
One more collection of amazing moments of Short-toed Eagles’ nesting life in Croatia are brought to your attention. Please, note: both mates of that pair are coloured very typically for their sexes. This excellent gallery of pictures and videos taken by a nature photographer Ante Karanušić can be viewed on his site.
Currently, you can find online full texts of these two articles published in scientific journals in 2004 and 2005. The papers have already been mentioned on our site before:
• Paola SACCHI, Dominga SOGLIA, Sandra MAIONE, Giuseppe MENEGUZ, Massimo CAMPORA, Roberto RASERO, 2004 – A non-invasive test for sex identification in Short-toed Eagle (Circaetus gallicus) // Molecular & Cellular Probes, 18 (3): pp. 193-196. – (En).
• Massimo CAMPORA, Guido CATTANEO, 2005 – Ageing and sexing Short-toed Eagles // British Birds, 98: pp. 370-376. – (En).
We would like to express our gratitude to Frédéric Pelsy for sharing these not numerous, but marvelous pictures of Short-toed Eagles in Sologne (France) /map/. The male and the females are well recognizable by colouration of their plumage which is seen in detail. Because of that several of the photos have also been added to our Age/Sex handbook.
A projected model of the plumage changing for Short-toed Eagle has been made by me for discussion and rectification by comments from the practising observers. This aims to make easier field recognizing of different ages of Short-toed Eagles for birdwatchers.
Area: southern Auvergne. Altitude: 870 m above sea level. Tree: pine Pinus sylvestris. Height: 6 meters.
The egg was laid near the 8th of April, the hatching happened around the 24th of May. The young bird took off the 30th of July, early afternoon. He was 67 days old. It was the twelfth succesful take-off in this site in 14 years.
The first visit – very discreet-happened when the chick was 10 days old. Between the 21th of June and the 30th of July, nine observatory sessions (circa 30 hours). Here is a photografic summary.