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Posts tagged ‘ageing’


Circaetus gallicus on Raptors ID website

Sep 29, 2018 / Comment

Circaetus gallicus, 3cy, October / by Àlex OlléThis WordPress site is dedicated to identification of Raptors in the nature. The main idea was to provide easy uploading various pictures of birds of different age and sex, then, to describe and categorize them correctly, developing in this way a rich database for Raptors identification. All photos of any species can be found by one click, ones of Short-toed Snake Eagle as well. Descriptions of sex and age-related features are in English and Catalan.

 

Records at the species range boundaries

Aug 31, 2018 / Comment

Immature Short-toed Eagle in UK in 2014, by Roger StarbuckSeveral records of Short-toed Snake Eagle at the boundaries of the species range were reported this summer. Local birders informed about observation of an eagle again in the United Kingdom, at Ashdown Forest /map/ in East Sussex: it was seen several times since June 21st. Unfortunately, the age of that bird has remained unknown. Four years earlier, a young Short-toed Eagle had been observed at Morden Bog /map/, near Wareham.

Photos of Short-toed Eagle by Liudmila Pozhidaeva on the Birds of Siberia websiteAt the opposite side of the range’s northern boundary, not far from Barnaul /map/, the administrative centre of the Altai Krai, a Short-toed Eagle was recorded this year too. Photos of an adult Short-toed Eagle female by Askar Isabekov on the Birds of Kazakhstan websitePhotos of it are available on the Birds of Siberia website. This time it was an adult bird, as well as the previous one observed in 2016. Also, this summer has brought many encounters with ST Eagles to birders in Kazakhstan, just enjoy the pictures.

 

A report on the rehabilitation of a Short-toed Eagle

Jun 30, 2018 / Comment

Although, this paper is rather old, it can be considered as a good example of a report on Short-toed Eagle rehabilitation. If all similar cases were described in such a detailed way, our knowledge on sexing and ageing of Short-toed Eagles would be much deeper:

Moulting tail of Short-toed Eagle

• Theo van de MORTEL, 2006 – Voor het eerst een Slangenarend Circaetus gallicus geringd in Nederland [Male Short-toed Eagle found emaciated in The Netherlands in May 2006] // De Takkeling, 14 (3): pp. 232-235. – Short-toed Eagle. file (Nl).

The article is available on the Natuurtijdschriften site now.

 

Observations of ringed ST Eagles in Israel in 2018

Jun 28, 2018 / Comment

Guilad Friedemann reports on observations of 3 Short-toed Eagles tagged with number colour rings in the Judean Foothills /map/ in 2011 and 2012 (Grey 62, Orange 3 and White 14). Those Short-toed Eagle males have been photographed by different observers this year at the age of 7 and 8 CY. Small photo galleries are represented on Guilad’s FB page with his brief explanations and comments (Iw):

For example, the male tagged as "Orange 3" is fully adult, although, his parents are still active, continue to hold the territory and breed. It is always a great pleasure for a researcher to know that chicks found and ringed in the past, in spite of many dangers, have become the magnificent adult snake eagles, to see them now as virtuosic fliers, ultraprecise spotters, looking like amazing semi-mythical creatures in the end.

 

Monitoring of ST Eagle in Lozère and Cévennes in 2017

Apr 30, 2018 / Comment

Monitoring of Short-toed Eagle in the Cévennes National Park /map/ and Lozère was continued by local conservationists in 2017:

Jean-Pierre et Isabelle MALAFOSSE, 2017 – Le Circaète Jean-le-Blanc, résultats pour 2017. 17 years old (18cy) Short-toed Eagle male hunts / by Michel REYNÉSuivi des Rapaces forestiers en Lozère et dans le Parc National des Cévennes [Short-toed Eagle, results for 2017. Monitoring of Raptors in Lozère and in the Cévennes National Park], rapport interne C.R.B.P.O./ P.N.C.: 13 p. – Short-toed Eagle. file (Fr), Short-toed Eagle. file (En) {rough translation}.

Our sincere gratitude to Jean-Pierre and Isabelle for sharing the report, as well as to Ferenc and Gábor Papp for its translation to English!

 

Full texts of previously published articles

Jul 30, 2016 / Comment

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. – Short-toed Eagle. file (En).

Massimo CAMPORA, Guido CATTANEO, 2005 – Ageing and sexing Short-toed Eagles // British Birds, 98: pp. 370-376. – Short-toed Eagle. file (En).