Do you know or do you use some monitoring method for honey buzzard (Pernis apivorus) population trend?
Thank you for information, but I mean field method. If it is better to use monitoring of some area, or monitoring from few points (where you count pairs and monitor the change in-between years).
Hi Vladimír,
Like Vinç said before, it is a really difficult species tot monitor, but what I would suggest is the following;
Within the area you want to study select a number of points from which you can observe and monitor the honey buzzards. This will make statistical analysis easier, and if you, for whatever reason, can't go out it is possible to send an assistent (or other volunteer) to do the counting/observations for you since the points where the oberservations need to be done are clear!
Best of luck with your project!
Regards,
Micha
Thanks for both answers. I agree with your idea. Two years ago I used three elevated points for monitoring area about 60 km2 (in the mountains). But I have not many time for honey buzzard monitoring this year. On other site, I want help to monitoring of HB in the SPA site, so I am looking for effective solution.
Hi Vladimír,
as already mentioned, certainly one of the toughest Central European raptors, in particular if finding nests is considered to be inevitable. Otherwise relative densities might also be of usage and display flights of HBs are pretty easily to observe unless over extended forest areas without watchout posts. Your eleavted points will be more then helpful!
As far as I know there is some research on the species in the Netherlands. Some of the studies might be worth to consider. I could imagine that people there have an extensive experience with monitoring these birds, unfortunately the report and the article are written in Dutch but perhaps it is worth to contact the authors directly.
e.g.
http://www.boomtop.org/Wespendief_hr.pdf
http://www.nou.nu/limosa/limosa_samenvatting.php?language=UK&nr=2873 (classical paper from the 1980ies)
Regards and good luck
Darius
Hi Darius, thank you for your interest, also I contacted Jan van Diermen some time ago. I wrote to this topic because many other researchers and experts can share their ideas and methods. Using of elevated points looks most useful for population monitoring and trend analysis.
Best wishes,
Vlado
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