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Posts tagged ‘behaviour’


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-toed Eagle breeding biology in NW India

Aug 31, 2017 / Comment

Ritualised behaviour between the female and male Short-toed Snake Eagle / by D. MoriAn article about breeding of Short-toed Eagles in Surendranagar District /map/ has been published in the Indian BIRDS – Journal of South Asian Ornithology this year. Such releases are always of great interest because observation data on Indian Short-toed Eagles are rarely available on the Web:

• Devvratsinh MORI, Raju VYAS & Kartik UPADHYAY, 2017 – Breeding biology of the Short-toed Snake Eagle Circaetus gallicus // Indian BIRDS. Vol. 12, No. 6: pp. 149-156. – Short-toed Eagle. file (En).

 

Photos of Short-toed Eagles in Northern Ukraine in 2017

Jun 30, 2017 / Comment

PISMENNYI K. 2017. Northern UkraineCompiling of the next annual gallery has been started, the gallery of photos taken in different regions of Northern Ukraine this year. Each Short-toed Eagle identified individually is indicated, as always, in captions by a letter and a year of the first representation in photo galleries on the site. The collection will be updated after the season.

 

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!

 

Live broadcast of Short-toed Eagle nest, 2017

Apr 5, 2017 / 1 Comment

Live broadcast from Short-toed Eagle nestGuilad Friedemann and the team started the live stream of another nest of the same Short-toed Eagle pair in the Judean Foothills /map/ this year, since April 2nd. As well as last year, the broadcast is available on the Israeli Birding Portal. For more details, also, please visit the Facebook community page of the Israel Raptor Nest Cam project.

 

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!

 

Short-toed Eagles in Northern Ukraine. Photos of 2016

Jan 31, 2017 / Comment

PISMENNYI K. 2016. Northern UkraineHere is the next annual gallery of pictures taken in Kiev, Chernihiv and Sumy Regions of Northern Ukraine in 2016. Short-toed Eagles of local pairs monitored during more than 10 years are captured in them. All the birds are indicated in captions by a letter and a year of the first representation in photo galleries on our site, starting with A11 – the old, very striped and dark-spotted, rather small but aggressive female living in the Mizhrichynskyi Nature Park /map/.