Frightening to think curlews are in such trouble. The UK’s population has halved since the mid-1990s, and this week speakers at a major conference dedicated to reversing the decline tell their curlew stories. Each day this week we'll be sharing some of the speakers blogs. Today's post is by Natalie Meyer, of Naturschutzbund Deutschland (NABU)...
There are between 3,700 and 5,000 breeding pairs of Eurasian curlews in Germany, which accounts for 0.3 to 0.7 per cent of the global population. Population trends here vary from steep declines to stable, depending on which of the Bundesländer (federal states) they are in and the protection effort undertaken. Declines seem to be caused mainly by too low reproduction, which itself is the result of intensive agriculture, habitat degradation and predation.
Since 2013 the Michael-Otto-Institute (NABU), supported by the Ministry of Energy, Agriculture, the Environment and Rural Areas of Schleswig-Holstein (Germany’s most northern Bundesland), has been working on a protection plan, which aims to give us guidelines for managing curlew populations in conventionally used grassland.
The study population has approximately 90 breeding pairs in a lowland grassland area (Eider-Treene-Sorge-Niederung), farmed for dairy production. This population owes its relative stability to good co-operation between farmers and conservationists.
To improve the effort we do basic research, to close some knowledge gaps such as those on survival and return rates, habitat requirements and population dynamics.
For that purpose we are marking curlews with individual colouring combinations to gain information about the required breeding success to compensate for mortality – an important value to estimate in order to gauge the efficiency of protection measures.
Despite all these efforts reproduction rates remained quite low. Our first estimates highlighted high predation rates on clutches of eggs as a major reason, most probably caused by red foxes.
We tested a second measure to protect single nests from ground predators by fencing them off with electric fences. We tested the applicability and success of this method.
My talk at Slimbridge will focus on these two protection measures: (1) protection against intensive agricultural practices and (2) nest protection against ground predators.
More information, visit (in German): https://bergenhusen.nabu.de/forschung/wiesenvoegel/index.html
Good stuff. As always, however much research is done (and plenty has been done for years by RSPB and others onlinelibrary.wiley.com/.../abstract and onlinelibrary.wiley.com/.../full - not to forget the curlew-nest-trampling-sheep in Wales conservationevidence.com/.../5556) the key is still in the sentence "This population owes its relative stability to good co-operation between farmers and conservationists."
Time is short, electric fencing is temporary and public opinion fickle. In my humble understanding, neither habitat or predator management is a solution on their own - both are most likely required in the name of public benefit for saving this species.
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