Monitoring of sand martin populations
The population of sand martins on the Drava fell by 75% over the last 30 years
An analysis conducted by WWF, in cooperation with the Natural History Society Drava, on the evening of the European day of bird watching (EUROBIRDWATCH 2016) showed that river bird populations have been somewhat stable over the last 10 years. However, an analysis of the monitoring results of river ...
Read more