I spent the night in the forest to wake up with lekking Capercaillie. The first minute of the recording two different males fly in to their favourite pine at dusk and directly after they "belch" once or twice. After one minute we have the lek at dawn when they have the very low buzzing (<100 Hz) at the sizzling end part.  April 21, 2023.
AudioTechnica BP6025, Mixpre 3ii

Capercaillies flying in at dusk and lekking at dawn

Recorded under cliffs in Alps - no wind was that night so there was almost complete silence . 
Owls and later falling rocks from cliffs which was maybe trigger by some animal walking high above microphones.
Edited with EQ 
Microphones ORTF Mkh40 Sennheiser
Recorder Zoom F6
Slovenia Alps
10192025

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Capercaillies flying in at dusk and lekking at dawn

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