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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.

 

Short faunistic notes: CE Belgium and NE Italy

Sep 30, 2017 / Comment

We are continuing to collect various texts about Short-toed Eagle records and observations in various regions. Along records in modern online databases, they give the fuller patern of the species distribution and its evolution within recent decades:

• Giacomo SGORLON, 2016 – Estivazione del Biancone Circaetus gallicus nella pianura Veneta Orientale [Summering of a Short-toed Eagle in the Eastern Veneto plain] // Uccelli d’Italia, 41: 150-152. – Short-toed Eagle. file (It) /map/.

• Lurent-Henry GÉE, 1989 – Séjour d’un Circaëte Jean-le-Blanc (Circaetus gallicus) en Meuse hutoise en juillet-aout 1988 [Stay of a Short-toed Eagle near the Huy City and the River Meuse in July-August 1988] // Aves, 26/3-4: 205-206. – Short-toed Eagle. file (Fr) /map/.

 

About the first nesting in Switzerland once again

Jun 30, 2017 / Comment

The article by Lionel Maumary and others contains the detailed description of the first ST Eagle breeding in Switzerland /map/ in 2012, observations of the breeding biology and the diet data particularly:

Pictures of the Short-toed Eagle pair taken in 2008, 2010 and 2012 by Lionel Maumary and others• Lionel MAUMARY, Hubert DUPERREX, Jacques CLOUTIER, Laurent VALLOTTON, 2013 – Première nidification du Circaète Jean-le-Blanc (Circaetus gallicus) en Suisse – Observations sur la biologie de reproduction, en particulier le régime alimentaire [The first nesting of Short-toed Snake Eagle in Switzerland – Observations of the reproductive biology, and the diet] // Nos Oiseaux, 60: pp. 3-24. (Fr) {rough translation}.

 

La Plume du Circaète n° 13-14-15

Apr 30, 2017 / Comment
La Plume du Circaète on the LPO website

This issue of La Plume du CircaèteShort-toed Eagle. file (Fr) {rough translation} contains materials of the 4th meeting of the Short-toed Snake Eagle French national network, conducted in Roquefixade (Ariège) on October 8-9, 2016. The list of contents (En):

p.2
· 4 years of observations on 30 sq. km in Aveyron
p.5
· Monitoring of a population on an area of Ariège
p.8
· Monitoring in the Marseille region
p.10
· Study of a reproduction using a photo-trap
p.16
· Monitoring, research and conservation in the Alpes de Haute-Provence
p.18
· Short-toed Snake Eagle in forest management
p.20
· Three behaviours: nest change; interspecific relationships; festoon flights
p.22
· General review of monitoring in the Aude
p.23
· Ageing of Short-toed Eagle chicks

Many thanks to Bernard Joubert, Jean-Pierre Malafosse, Manon Munoz, Renaud Nadal and all the authors of the bulletin for sharing knowledge!

 

Lozère & the Cévennes National Park. Overview for 2016

Mar 29, 2017 / Comment

Just one more annual overview of Short-toed Snake Eagle monitoring in the Cévennes National Park /map/ and Lozère for 2016:

This 2cy Short-toed Eagle was photographed by Bastin MEISE in Central Germany on August 1, 2015Jean-Pierre et Isabelle MALAFOSSE, 2016 – Le Circaète Jean-le-Blanc, résultats pour 2016. Suivi des Rapaces forestiers en Lozère et dans le Parc National des Cévennes [Short-toed Eagle, results for 2016. Monitoring of Raptors in Lozère and in the Cévennes National Park], rapport interne C.R.B.P.O./ P.N.C.: 10 p. – Short-toed Eagle. file (Fr), Short-toed Eagle. file (En) {rough translation}.

Great thanks to Jean-Pierre and Isabelle for sharing this, to Ferenc and Gábor Papp for their kind help in the translation of the text to English!

 

Monitoring of STE in the Alpes de-Haute-Provence, 2016

Dec 25, 2016 / Comment

Numbers of the controlled and probable Short-toed Eagle breeding sites within more than 7 yearsThe latest annual review of Cédric Arnaud:

• Cédric ARNAUD, 2016 – Suivi du Circaète Jean-le-blanc dans les Alpes de-Haute-Provence. Rétrospective 2016 [Monitoring of Short-toed Eagle in the Alpes de Haute-Provence. Review for 2016]: 19 p. – Short-toed Eagle. file (Fr) {rough translation}.

The list of contents (Fr): Résultats du suivi 2016 (résultats, répartition) – 3; Suivi de la reproduction (données chiffrées, discussion, taux de reproduction et effort de suivi, échantillon de suivi) – 6; Caractéristiques des nids identifiés (arbres supports, emplacement des nids) – 9; Régime alimentaire – 11; Demandes particulières de suivi ou d’intervention avant travaux – 12; Interventions d’information, de sensibilisation et d’échanges – 13; Fiche de dérangement – 13; Centre de soins de la faune sauvage 04-05 Aquila – 14; Observations particulières – 14; Bases de données en ligne et accessibilité aux partenaires – 15; Participants – 16; Campagne de suivi & objectifs 2017 – 17; Résumé – 18.

 

October Circaetus meeting in France, the 2nd circular

Sep 12, 2016 / Comment

As previously announced, the 4th meeting of the Short-toed Snake Eagle French national network in Roquefixade (the Ariège Department) /map/ is scheduled for October 8th and 9th, 2016. This conference is a meeting between passionate volunteers and not a scientific symposium. The program is not yet complete and it is still possible to propose communications. Any experience in monitoring Short-toed Eagles is of great interest and deserves to be shared.

Please, read the detailed information about the meeting: PDF file (Fr).