ki-ki-ki-ki-ki-ki-ker is as close as I can describe the song of the Bald Eagle. Always sends shivers down my spine. and I never tire of it.
The biggest mistake most people make when trying to photograph singing birds is not using a fast enough shutter speed; those mandibles don’t stop moving!
The second biggest mistake is framing the image too tight. Eagles usually move their head while calling; often, but not always, stretching out toward the sky, so be ready to rotate your camera to vertical.