Only ever heard it once, I was about 13, walking home in the dark when I heard it across the road, I went over and a cat had just caught the frog, so I was grateful it had screamed and given me the chance to save it. Really weird sound I agree.
The one I was carrying didn't sound like the description you gave, @Fire. It was a monotonous single note, which when I come to think of it, was the strange thing about it. As if I had pushed a button and set off an alarm!
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It was a monotonous single note, which when I come to think of it, was the strange thing about it. As if I had pushed a button and set off an alarm!