Circaetus gallicus information navigator

Monitoring of 9 different pairs of Short-toed Eagles has been conducted during 10 years in Northern Ukraine (Kiev Region /map/, Mizhrichynskyi Park /map/ of Chernihiv Region, southern part of Sumy Polissya /map/). Some calculations and results of the monitoring are represented in tabular forms:

• K. PISMENNYI, 2013 – Some data on breeding of Short-toed Eagle in Northern Ukraine // short-toed-eagle.net – ; in the form of XLS file with formulas: (En).

Average breeding success amounts to 0.60 juvenile / territorial pair and is quite close to this index for France: 0.57. The last result is based on observations of 2835 (!) breeding cases which have been managed to make by French national Circaetus gallicus network for 11 years (Bernard Joubert, personal communication). Also some other conclusions can be made: old pines (Pinus sylvestris) are prefered by Short-toed Eagles for nesting in Northern Ukraine; the eagles more often change their nests than they successfully breed; nest height is highly variable; the eagles’ choice of a nest depends on their previous breeding success; after an unsuccessful season the nest is changed with high probability, after successful one the following choice of a nest is unpredictable.

We would like to express our gratitude to Frédéric Pelsy for sharing these not numerous, but marvelous pictures of Short-toed Eagles in Sologne (France) /map/. The male and the females are well recognizable by colouration of their plumage which is seen in detail. Because of that several of the photos have also been added to our Age/Sex handbook.

During 10 years of observations in Central Northern Ukraine (Kiev Region /map/, Mizhrichynskyi Park /map/) a lot of photos of several the same Short-toed Eagles have been taken. Some of them can be viewed in the galleries (just an example). Since Short-toed Eaglers’ the biggest flight feathers are often seen from a great distance they are easily recognizable in photos. Especially it concerns 4th-10th primaries of both wings. Accumulation of data allowed to determine inter-moulting periods of certain feathers:

• K. PISMENNYI, 2013 – Short-toed Eagle. Replacement of the biggest 14 flight feathers // short-toed-eagle.net – (En).

First of all, the results might be of interest as additional information for recognizing individuals in the nature from year to year, together with individually typical plumage colouration and silhouettes in flight at certain angles in certain poses. Regular photographing of Short-toed Eagles at their breeding sites and foraging grounds allows to distinguish them with high probability without special marking, without stressing and often even without disturbing the birds at all.

The interview has been published on the European Raptors website yet on March 12. This, already the forth one dedicated to Short-toed Eagle on the site, was taken by Markus Jais on February 20. This time Gregorio Moreno-Rueda shares his knowledge about the feeding ecology of Short-toed Eagles in Spain, their threats, why they lay only one egg and how the future looks like for those impressive raptors in that impressive country.

Two young Short-toed Eagles, this time Egidio and Irene, have been fitted with satellite transmitters in Regional Park Gallipoli Cognato /map/ again. You can find the map showing the birds’ migration and also read a short history of the project since 2010 on the same webpage. Thanks to Ugo Mellone for informing us!

Please pay attention to bibliographical information and the Spanish summary of the following article written by Beatriz Yáñez and others. It concerns presence of Invertebrates in diet of Short-toed Eagle in the Gibraltar region /map/:

• Beatriz Yáñez, Antonio-Román Muñoz, Miguel Ferrer, 2013 – Invertebrates as Prey of Short-toed Snake-Eagles (Circaetus gallicus) // Journal of Raptor Research, 47(3): P. 320-323.

This gallery consists of photos taken by Sergey Domashevsky in period of 2010-13 during his expeditions to some regions of Ukraine and of Central Asia. Sergey is an expert of Ukrainian Birds of Prey Research Centre, his main activity is aimed at research and conservation of birds of prey in Ukrainian Polesie such as Spotted, Short-toed Eagles and other species of raptors and owls. As always, some explanatory comments can be found below the presented images.