Gábor Papp has collected and summarized information about colour-ringing of Short-toed Eagles in Hungary. The program has been continued for 7 years. The current numbers of ringed eagles, observations and photographing of the birds, prospects of new resightings are described
in the communication:
• Gábor PAPP, 2019 – Results of the colour-ringing scheme of the Short-toed Eagle in Hungary between 2013 and 2019 // short-toed-eagle.net (En).
Örs the satellite-tagged Short-toed Eagle, marked as a juvenile in 2017, has returned to Hungary after two years. He hatched in the area of the Kiskunság National Park /map/ being famous for hosting the only known nesting population in the Hungarian lowlands. He spent the past winter in the Sahel Zone on the border of Sudan and South Sudan, a regular wintering area for the species. On the last day of March, he packed up and started his northbound migration, however, he stopped in Central Turkey and we were worried that he would spend the entire summer there again, after the summer of 2018. Fortunately, he decided to move on on June 24 and to our delight, he reached the border between Croatia and Hungary a bit more than a week later. Since then, he paid a visit to Burgenland, Austria and Western Slovakia where he stopped at military bases, which were probably familiar for him since he was born in one of those in Hungary. Recently, he has been in Northwestern Hungary, an area where observations of this species are quite rare.
We hope eventually he will visit his home ground and may also mark a few, so far unknown, territories in the Kiskunság area.
The map of Örs’ tracks is available on SATELLITETRACKING.EU.
The Natuurtijdschriften site was already mentioned on HoverOverUs. Here we present to your attention some more articles published in different years and dedicated particularly to Short-toed Eagles:
• Bas VAN GENNIP & Bert DE BRUIN, 1996 – Nieuw voor Groningen: Slangenarend [New for Groningen: Short-toed Snake Eagle] // De Grauwe Gors, Vol. 23, No. 4: pp. 113-114. – 
(Nl).
• Arno IZAAKS, 2007 – Ruim vijf weken een Slangenarend Circaetus gallicus in de duinen van Meyendel (En) [More than five weeks an ST Eagle resided in the dunes of Meyendel] // De Takkeling, Vol. 15, No. 2: pp. 114-116. – (Nl).
• Chris VAN DEURSEN, 2010 – Slangenarend waarnemingen (Circaetus gallicus) in de regio [Observations of Short-toed Snake Eagle in the region] // Fitis, Vol. 46, No. 3: pp. 125-126. – (Nl).
• Willem VAN MANEN & Rob G. BIJLSMA, 2017 – Slangenarenden Circaetus gallicus in Nederland: voorschot op een broedgeval (En) [Short-toed Snake Eagle in the Netherlands: progress toward breeding attempt] // De Takkeling, Vol. 25, No. 3: pp. 224-241. – (Nl).
All documents with mentions of STE can be found using the site search.
Ildikó Baranyi is a wildlife photographer living in Romania. A lot of excellent pictures of the local nature are presented on her website. Among them you can find a photo-gallery dedicated to Short-toed Eagles. The eagles in intermediate and adult plumage, clear signs of the plumage replacement can be seen in the photos. All of them were taken in Romania, including ones of a 2cy individual summering in Europe.
Henry de Lestanville describes in his paper staying of 2 Short-toed Eagles at Brassoir in summer 2016 and the current status of the species in Picardy /map/:
• Henry DE LESTANVILLE, 2018 – Stationnement de deux Circaètes Jean-le-blanc Circaetus gallicus à Brassoir en 2016 [Staying of two Short-toed Eagles at Brassoir in 2016] // Avocette, 42 (1) – Revue naturaliste de Picardie Nature: pp. 3-8. – (Fr).
An impressive number of ST Eagles migrating at Sarimazi, Southern Turkey /map/, in autumn 2018 is reported on the Egyptian Vulture New LIFE site: 10853. This raises a lot of questions about real strength of their streams from Eastern Europe. Many thanks to Gábor Papp for sharing!
The following paper by Ivan Budinski established principles of the local Short-toed Eagle population monitoring program in Croatia:
• Ivan BUDINSKI, 2014 – Nacionalni program za monitoring zmijara (Circaetus gallicus) [National monitoring program for Short-toed Eagle] // Udruga BIOM. Zagreb: 10 p. – (Hr).
The author is one of Croatian researchers involved in the project of GPS tracking of Paško, the local young Short-toed Eagle. The map of the bird’s migratory movements is available online and regularly updated.
Several records of Short-toed Snake Eagle at the boundaries of the species range were reported this summer. Local birders informed about observation of an eagle again in the United Kingdom, at Ashdown Forest /map/ in East Sussex: it was seen several times since June 21st. Unfortunately, the age of that bird has remained unknown. Four years earlier, a young Short-toed Eagle had been observed at Morden Bog /map/, near Wareham.
At the opposite side of the range’s northern boundary, not far from Barnaul /map/, the administrative centre of the Altai Krai, a Short-toed Eagle was recorded this year too. 
Photos of it are available on the Birds of Siberia website. This time it was an adult bird, as well as the previous one observed in 2016. Also, this summer has brought many encounters with ST Eagles to birders in Kazakhstan, just enjoy the pictures.