Birdwatching news and bird photography from Azerbaijan- by Kai Gauger and Michael Heiß
Donnerstag, 29. Oktober 2015
Calling Chiffchaffs
Interesting article about the vocalisation of wintering Chiffchaffs in Azerbaijan by Lukas Pelikan.
http://sternaberttrips.blogspot.de/2015/10/vokalisation-zilpzalp.html
(in German with English summary)
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