I’m a big fan of Bernie Krause, a soundscape ecologist who records the sounds of natural environments. I often listen to his stuff while I’m working. The recordings that feature a lot of bird calls can set the local birds in my neighborhood off. They will all start chirping back.
I haven't thought too far into it, but I imagine they freak out more when it's a hawk/falcon call than a songbird.
[0] https://stonemaiergames.com/games/wingspan/