http://www.ilovewavs.com/Effects/Birds/Birds.htm

http://www.animal-sounds.org/air-animal-sounds.html

http://eol.org/pages/695/media?page=17&per_page=40&sort_by=status&status[]=all&type[]=sound

http://www.general-files.com/download/gs5101d8a0h32i0/alcedo-atthis.mp3.html

http://www.hedgehog-rescue.org.uk/sounds/noises.php

http://badgerland.co.uk/animals/voice_detailed.html

http://www.avisoft.com/sounds.htm - multe