I am looking for informations and experiences regarding the dawn calling activity of Eagle Owls in the context of a special conservation problem in Austria.
In relevant papers it is regularly mentioned that the calling activity of male Eagle Owls (song) in the dawn phase is comparable to the dusk phase. However, although there is an impressive amount of information about the dusk phase especially from Spain and France, I could not find precise information regarding the dawn phase (still, most surveys are based on dusk calling). In particular, I would need information about, e. g., start and end of calling before and after sunrise, call duration, detectability of existing territories which would help me to make a decision if to include controls in the dawn phase in addition to the dusk phase.
Many thanks in advance!
Owls are nocturnal. Dusk is the best time. If you have provisions, you can strategically place a sound recorder without disturbing anything around and camouflaging it with the surroundings.
Thanks for the suggestion, Bindia Gupta , but this would not be feasible. Individual Eagle Owls use many different song posts which are spaced within a range of several hundred meters up to much more than 1 km within their territories in places which in my area are almost impossible to reach. There is no doubt that Eagle Owls have a second song peak at dawn like many other owls. As my question was related to the efficiency of censusing this species at dawn, I was interested in details (e.g., song duration) of the dawn peak.
https://soundcloud.com/dabasskanas/eagle-owl-song
This was recorded at 21:15
https://www.audubon.org/news/a-beginners-guide-recording-bird-vocalizations
Take the help of an experienced local during your survey.
Por lo general los picos máximos de actividad de los buos y lechuzas es durante la noche. En algunos casos comienzan al atardecer y duran toda la noche, eso depende de cada especie. Seria importante que investigues cual es el momento en que ellos están activos y ahí decidir cuando te conviene realizar el estudio.
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