Circaetus gallicus information navigator

Category: Texts › En › En-Summaries ›


An article on ST Eagle aggregations and dietary changes

Jan 30, 2018 / Comment

The represented article by Sameh Darawshi and others has been recently published in the latest issue of the Journal of Raptor Research:

Sameh DARAWSHI, Yossi LESHEM and Uzi MOTRO, 2017 – Aggregations and Dietary Changes of Short-toed Snake-Eagles: A New Phenomenon Associated with Modern Agriculture // Journal of Raptor Research, Vol. 51 (4): pp. 446-450. (En).

 

Bernard Joubert’s article on communication of ST Eagles

Dec 10, 2017 / Comment

Photos taken by Bernard Joubert: Short-toed Eagles' communication posturesThe following paper by Bernard Joubert on Short-toed Snake Eagle communication abilities was recently published:

• Bernard JOUBERT, 2017 – Circaète Jean-le-Blanc : des "mots" pour le dire [Short-toed Eagle: "words" to tell] // Rapaces de France, n° 19: pp. 54-55. – Short-toed Eagle. file (Fr) {rough translation}.

The summary

Short-toed Snake Eagles have the rich social language, various tools which help them to express their intentions and relation to behaviour of other representatives of their species. The main problem of studying their behavioural language is defined by difficulties of correct interpretations. Besides various vocal signals, these eagles reveal a rich body language vocabulary, thanks to the extraordinary plasticity of their plumage, which is used for hovering in different airflows while hunting. Simplistically, 3 types of signals are identified: those related to movements, postures and holding of plumage.

Examples of the gestural communication are: aggressive demonstratively slow and strong wing-beats, so-called «vulture» flights, territorial «festoon» display flights.

Communicating through postures includes: an aggressive «albatross» posture, a posture of «angel» which is used for marking a chosen nest for the partner.

Communicating through appearance changes at close contacts comprises states of occipital feathers and pupil size, which can express both tension and relaxation of birds.

This brief review is nothing more than an invitation to observe and puzzle out those various and subtle means of ST Eagles’ communication.

 

Another subspecies of Short-toed Eagle determined

Nov 30, 2017 / Comment

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.

 

Breeding biology & interactions of STE & LLB in Israel

May 30, 2017 / Comment

The recently accepted article of Guilad Friedemann and others is a result of the study of interspecific interactions between Short-toed Eagles and Long-legged Buzzards and their breeding in the Judean Slopes /map/:

• Guilad FRIEDEMANN, Yossi LESHEM, Lior KEREM, Avi BAR-MASSADA & Ido IZHAKI, 2017 – Nest-site characteristics, breeding success and competitive interactions between two recently sympatric apex predators // Ibis. Accepted Author Manuscript. doi:10.1111/ibi.12498; the Supplementary online material – Short-toed Eagle. file (En).

 

Fresh article on migration & wintering of Short-toed Eagle

Jul 30, 2016 / 1 Comment

The following article has recently been accepted for publishing online. The abstract and description are available for free at the moment:

Ugo MELLONE, Giuseppe LUCIA, Egidio MALLÌA, Vicente URIOS, 2016 – Individual variation in orientation promotes a 3000-km latitudinal change in wintering grounds in a long-distance migratory raptor // Ibis. Accepted Author Manuscript. doi:10.1111/ibi.12401 (En).

 

La Plume du Circaète n° 12

Jun 11, 2016 / Comment
La Plume du Circaète on the LPO website

This year’s issue of the bulletin La Plume du Circaète is currently available – Short-toed Eagle. file (Fr) {rough translation}. The list of contents is in English (En) this time, thanks to Ferenc and Gábor Papp:

PROTECTION AND STUDY

p.2
· Observations of 2cy STEs in Europe
p.3
· Experiments with artificial nests for STEs
p.4
· Feeding group of STEs in Minervois
p.5
· Unusual start of migration
p.6
· Preliminary data on the Short-toed Eagle in the suburbs of Marseille
p.11
· A Short-toed Eagle trying to bath?
p.12
· STE monitoring in Haute-Province in the Alps
p.14
· Protection of a nesting habitat in Vendée
p.16
· Setting up a STE network in Gard
p.17
· Visual performance of the Short-toed Eagle
p.18
· Bad luck for one, good luck for another
p.19
· Life of the STE in pictures
p.25
· Reflections on flying on thermals
p.27
· Data on skipping breeding in Haute Loire – What is the value of observation?
p.28
· About prey and feeding
p.30
· Note on post-breeding migration at the monitoring site of Eyne in 2015

INTERNATIONAL

p.35
· First nesting of the STE in Suisse
p.36
· Individual variations in summering areas among immature STEs
p.37
· Influence of geographical and climatic factors on the migration of the STE
p.38
· Seminar in Grosetto, Italy

CONNECTION AND EVENTS

p.39
· The STE flyer is finally available
p.40
· 4th Short-toed Eagle meeting
 

Short-toed Eagles in Flanders (Belgium)

May 31, 2016 / Comment

The following extended descriptions of observations of Short-toed Eagles in Flanders /map/ (the nothern portion of Belgium) are available on the Natuurpunt website (Nl):

• Wouter FAVEYTS, 2010 – 2010: een superjaar voor Slangenarend in Vlaanderen [2010 – a bumper year for Short-toed Eagle in Flanders] // Natuur.oriolus, 76(4): pp. 132-134. – Short-toed Eagle. file. The article contains English and French summaries.

…and other texts:

The Short-toed Eagle is one of our smaller eagles (Photo: Kris De Rouck)• Dominique VERBELEN, 2014 – Slangenarend Jacobus zorgt voor spektakel in de Kalkense Meersen [Short-toed Eagle makes a show in Kalkense Meersen] // www.natuurpunt.be.

• Han LAGRING, Gerald DRIESSENS, 2015 – Slangenarend op bedevaart in Groot Schietveld [Short-toed Eagle on a pilgrimage in Groot Schietveld] // www.natuurpunt.be.