Unknown audio from Poland (1 Viewer)

[JayFeatherPL]

North-eastern Poland, 9th of August, 2 pm, the weather was warm, two birds, big birds were flying above the meadow, I didn't see the bird's
View attachment AUD-20230809-WA0005 (mp3cut.net).mp3
colours

 

[Alexander Stöhr]

Hello,

its a Red Kite for me.

A question from me: I often struggle to separate Red and Black Kite calls. One reason surely is that both species are very variable = they have a quite varied repertoire. (Although I have heard so many of them over the years now).

So I hope for comments and confirmation here. Thanks!