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.