General breeding bird index

  • Fewer breeding birds in agricultural areas than in 2007

    Since 2014, the number of breeding birds in agricultural areas has been lower than it was in 2007. The fluctuations between 2007 and 2012 are not significant, but the decline between 2012 and 2014 is. This is shown by the fact that the index values and the margins of uncertainty were lower from 2012 to 2014 than the initial value of the index in 2007. From 2014 onwards, the numbers seem to have stabilised at a lower level.

  • No clear trend in breeding birds in forests

    The breeding birds in forests have been gradually declining since 2017, but the decline between 2007 and 2018 is not significant for the moment. Throughout the period, the initial value of the index remained within the lower reliability margins. Additional research is necessary to establish whether there could be a difference between resident birds and long-distance migratory birds in the forest areas.

  • Breeding birds in diverse habitats in decline again after increasing until 2013

    The breeding birds that breed in diverse habitats show a significant increase in the 2010-2013 period. This is shown by the fact that the index value and the margins of uncertainly in 2013 were above the initial value of the index in 2007. There has since been a decline to the level of 2007.

Sources

Research Institute for Nature and Forest (INBO): General breeding bird index

Publication date

20 December 2018

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