25/06/2026
At Lake Ludaš, RIPARIA participates in the Constant Effort Sites (CES) programme — an international, standardised monitoring scheme used to follow bird populations during the breeding season through scientific bird ringing.
RIPARIA has been involved in the CES programme since 2018, in cooperation with JP Palić–Ludaš, within the Special Nature Reserve “Lake Ludaš”.
Each year, between 500 and 1,500 birds are ringed through the CES programme at Lake Ludaš. The monitoring is carried out from 15 April to 15 July, always under the same standardised conditions: the same location, the same number of ornithological nets, the same time of day, and the same duration of fieldwork.
This consistency allows us to compare data between years and follow important changes in bird populations, including population trends, breeding success, and survival rates.
The CES programme at Lake Ludaš is the only long-term, standardised bird monitoring programme of this type in Serbia.
All interested volunteers are welcome to join our field activities. Bird ringing is carried out by trained and licensed ringers, and all birds are released back into nature after a short handling and data collection procedure.
For more information, contact us via Instagram, Facebook, or email.