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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.

 

Life of Short-toed Eagles in photos by Bernard Joubert

Feb 19, 2017 / Comment

JOUBERT B. 2010-2016. Haute-LoireThese amazing pictures and text were published in the latest La Plume du Circaète. Few of them were included in the previous galleries of Bernard Joubert on our site. Then, several new photos taken in March 2016 have been added and described by the author. Many thanks to him for sharing the pictures and especially for detailed comments on them, also to Ferenc and Gábor Papp for their kind help in the translation!

Moments of life

During these 20 years, while we have been following the Short-toed Eagles, we could obtain numerous pictures taken in ideal conditions, some of which we later published, however, I never played with the thought seriously that I should take advantage of it since photography is very laborious and has little use in conservation.

Nevertheless, in 2010, I decided that I would give it a try at a nest site where I could do it without any disturbance. In January, I built a hide, which I dug in the ground about twenty metres from the nest. I made a frame of beech and covered it with smaller pine branches. This nest site seemed to attract this particular pair, they visited it during last autumn several times.

I made myself comfortable in the hide in the first days of March, not knowing how remarkable moments and wonderful events of the everyday life I would experience soon.

I used a quite mediocre Nikon camera with 110 mm equivalent focus length*, but still I could record their whole breeding cycle except incubation without being noticed by them.

I would like to share a few pictures…

Bernard Joubert

* – also, photos taken with Panasonic Lumix FZ1000 are included.

 

Meeting in Roquefixade (France), a brief review

Oct 30, 2016 / Comment
Roquefixade: a lot of sites for Short-toed Snake EaglesParticipants of the 4th Circaetus meeting

After Langeac (2004), Nadaillac (2008), and Florac (2012) the 4th Circaetus meeting took place in Roquefixade (the Ariège Department), on October 8th and 9th, 2016. Forty naturalists involved in the monitoring of the species, found themselves there at the invitation of Nature Midi-Pyrénées and LPO Mission Rapaces, to share their experience of the studies. The total number of the meeting participants was about fifty. The program illustrated the diversity of birders’ approaches within their means and goals.

Read the rest of this entry »

 

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).

 

4th Circaetus meeting in France on October 8/9, 2016

Feb 20, 2016 / Comment

The 4th meeting of the Short-toed Snake Eagle French national network is planned to be held: welcome to the Cathar Country!

The 4th meeting of the network will be hosted by Nature Midi-Pyrénées and LPO Mission Rapaces in Roquefixade (the Ariège Department) /map/ on October 8th & 9th, 2016.

The sessions will be held in the town hall where the Eagle Owl meeting was held in 2014. Detailed information about food and accommodation of the participants will be available soon in the next announcement and the registration form.

As usual, the presentations cover various topics: general monitoring of Short-toed Eagle in various regions by local groups, various fields of biology or ecoethology, protection and conservation of the species… All your works are of interest and deserve to be better known.
The presentations should take not more than 20 minutes to allow 10 minutes discussion after each of them. Proposals of your speeches are expected from now on.
To be accepted, your submission must be sent in the form of a summary to one of us (emails below) by July 30th in order to set the agenda for the two days of the meeting.

A registration brochure will be available very soon. Thanks in advance for retaining the date in your fall calendar!

View the original message please: Read the rest of this entry »

 

Flying and visual abilities of Circaetus gallicus

Dec 20, 2015 / Comment

The following two texts are dedicated to notable physical abilities of Short-toed Eagles andNormal angle of inclination of Short-toed Eagle flying up, like the previous one of Bernard Joubert, are going to be included in the next issue of La Plume du Circaète (Fr):

• Bernard JOUBERT, 2015 – Performance visuelle du Circaète [Visual abilities of Short-toed Eagle] // short-toed-eagle.net.

• Bernard JOUBERT, 2015 – Quelques réflexions sur le vol [Some reflections on the flight] // short-toed-eagle.net.

 

Snake Eagles in human cultural interpretations

Nov 14, 2015 / Comment

The image of an eagle holding a snake : La Chaise-Dieu (France)The images of an eagle killing a snake is quite widely distributed and can be found in various works of art in different countries, with different cultural traditions, rather geographically distant from each other. Some considerations to this matter are given by Bernard Joubert in his short essay for the next issue of the La Plume du Circaète bulletin which is prepared for release in the near future:

• Bernard JOUBERT, 2015 – Malheur des uns, bonheur des autres [Unhappiness of some, delight of others] // short-toed-eagle.net (Fr).