Moorhens (Gallinula chloropus) sing and cry and croak and peep and whistle and quack. If you hear a very strange sound coming from the marsh 10 to 1 it's a Moorhen. In this sample two of them announce their presence.
Douglas Von Gausig (recordist; copyright holder), Naturesongs.com
This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported License.