Despite the fact that birds are very suitable for monitoring nature, we have long lacked a good monitoring project for
terrestrial nesting birds in Norway.
The project "Extensive monitoring of breeding birds (TOV-E)" carried out in cooperation between NOF
Norwegian Institute for Nature Research (NINA)
, NORD University
and the Norwegian Environment Agency
and is the most important project for monitoring population trends for Norwegian bird species
Norway's bird fauna is dynamic. From year to year there are small or large changes in the composition of the fauna.
Some species become more common, others become more rare, some habitats are less common while others become more common.