Hello, I have tried all of the bird song ID apps and none of them are identifying this sound correctly. We have not seen this bird, we have only heard it. It will normally make this noise twice and then we won't hear it again (I think it knows I'm trying to record it). We are in mid/north Georgia -US. We have listened to all of the songs of birds that we have positively ID'd in our yard and it doesn't match any of them. If someone can help point us in the right direction we would be grateful!