Tijs van den Berg
|ring area||The Netherlands, near Utrecht|
|observations||113, of which 102 are captures|
|ringed in||2016 to 2019|
Tree Sparrows are getting quite rare around Haarzuilens. The species is declining fast. VRS de Haar hopes to get more insight in trends in survival and dispersion of this species in our research area.
The position of the metal ring is important for the identification of an individual.