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Posts tagged ‘behaviour’


La Plume du Circaète: STE in Northern Ukraine (En)

May 14, 2018 / Comment

The English (En) version of that article with links to more pictures:

Old sites of pine forests are utilized by Short-toed Eagles for nesting

Konstantin PISMENNYI, 2018 – Le circaète dans le nord de l’Ukraine : état et avenir des populations, observations sur quelques couples et individus [The Short-toed Snake Eagle in Northern Ukraine, the population state and outlook, observations of certain pairs and individuals] // La Plume du Circaète n° 16-17: pp. 11-15.

 

La Plume du Circaète n° 16-17

May 9, 2018 / Comment
Circaète Jean-le-Blanc on the LPO website

La Plume du Circaète n° 16-17 – Short-toed Eagle. file (Fr) {rough translation} has been recently published. As usual, various unusual events, observations, ideas are reported in it. The list of contents (En):

COMMUNICATIONS

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· A Short-toed Eagle stuck in a fence
p.2
· A bewitched Short-toed Eagle
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· Disturbance survey
p.3
· Interaction with Ravens
p.3
· Predation of a newt
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· Rescue of youngs
p.5
· The issue of balance

MONITORING / CONSERVATION

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· Preservation of a breeding site in the forest of Bouconne
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· Behaviour – chronometer: is it an observation tool?
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· Success rate

INTERNATIONAL

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· The Short-toed Eagle in Northern Ukraine

TRIBUTE

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· Tribute to Christian Aussaguel

Thanks a lot to Bernard Joubert, Jean-Pierre Malafosse, Renaud Nadal and all the authors of the bulletin for sharing their materials!

 

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!

 

Short-toed Eagles in Northern Ukraine, 2017 (part II)

Feb 28, 2018 / Comment

PISMENNYI K. 2017. Northern UkraineThe 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.

 

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.