Not really a bird but that’s how the lady said it sounds. I took it to dealership because it sounds like a bearing or whistling sound under the hood . It sounds like the high pressure fuel pump under the hood making a sound , the warranty just about up they said they are going to replace it , but I wonder if it’s going to fix it fore good . It sounds like a design flaw that might come back. . I guarantee if you have the 3.5 l at some point you will be dealing with it mine start at 90k.