Owls especially barn owls. Murmurations of starlings are pretty cool to watch too. Watching and listening to the local male blackbirds in and around my garden at this time of year also have me spell bound.
Si.
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Reminds me of a very similar experience I had with Lyrebird in Sydney's Royal National Park a long time ago, CJ. The difference is the bird knew I was there and didn't seem to mind in the least.Distinctly remember it was the first time I was aware of the joy and satisfaction of watching something at such close range that wasn't in the least concerned about my presence. A few years later when the famous footage appeared on Attenborough's Life of Birds, I wondered if it could be the exact same bird I'd been watching?
The most breathtaking observation for me was seeing a beautiful full adult male Pallid Harrier holding territory and displaying, at Forest of Bowland in Lancashire in 2017.