hrvatski

Štekavac Haliaeetus albicilla

The White-tailed Sea-eagle is distributed from northwest Europe and Scandinavia to the east and in central Europe along the Danube river basin. The Danube basin birds are considered to form a separate sub-population with resident adults and vagrant immatures. The estimated Croatian population is 135-155 pairs and considered Vulnerable nationally. Two color marking projects (from 1985-1991 and 2005 onward) have generated a relatively high number of recoveries (240) but provided insight primarily on the dispersive movements of immature birds in their fist three years of life. All birds wandered across the Pannonian plain, along the floodplains of large rivers (Danube, Drava, Sava) and adjacent fishponds. The maximum distance from the natal site was 178 km, the average dispersal distance increasing with the age. During fist two years of life between 35-50% of eagles stay within 10 km of the natal site. Kopački rit wetlands have proved to be the most important locality and birds frequently returned to the same place during their dispersal. The longest recorded movement of the species is of a bird ringed in Finland and found injured 1, 960 km S near Bjelovar – the only representative of the true migration of the northern sub-population.

orao štekavac, Haliaeetus albicilla, seoba, prstenovani nalazi

nije evidentirano