Tree Sparrow

ring with A and 2 plain rings

Details

coordinator
Tijs van den Berg
website http://www.vrsdehaar.nl/
cr-birding http://www.cr-birding.org/node/3763
ring area The Netherlands, near Utrecht
animals 98
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.

Example bird

   
A
 
 
Shorthand: NW(A)M/BW
This is an arbitrary example of a bird that might not exist.

Data entry