Graureiher (dt.), Grey Heron (engl.)
Photographing a pond I walked into this frogs' chorus. The question is, what species are they exactly?
I guess it's a Corvus. Sounds like one. The question, though, is what kind of Corvus exactly it is. So if anybody is an expert and can determine it by location, date and sound, please go ahead, comment is free. :)
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