Sunday, December 20, 2020

The Migratory Bird Treaty Act must be reviewed to strengthen our agreements with our partners.

December 12, 2020

Thalassarche melanophrys (click here)

Europe’s breeding bird populations (click here) have shifted on average 1 kilometer north every year for the past three decades, likely driven by the climate crisis, according to one of the world’s largest citizen science projects on biodiversity.

The European Breeding Bird Atlas 2 (EBBA2) provides the most detailed picture yet of the distribution of the continent’s birds, after 120,000 volunteers and field-workers surveyed 11 million square kilometers, from the Azores in the west to the Russian Urals in the east.

The book documents changes in the range of Europe’s 539 native bird species in the 30 years since the first EBBA, which was published in 1997 but was based on observations from the 1980s. It shows that since the first study, each population can be found around 28 kilometers further north.

Mediterranean species such as the European bee-eater and little egret are now reaching the UK, France, and the Netherlands, mainly due to milder winters. Eurasian bitterns, pied avocets, and red kites have also expanded their range, probably in response to better protection of habitats coupled with laws banning persecution.

Overall, 35 percent of birds increased their breeding range, and 25 percent contracted their breeding range. (As for the rest, either they did not show any change or the trend is unknown.) Forest birds and those protected by international legislation have generally expanded their range, while farmland birds occupy a smaller total area....