Llyfr adar Iolo Williams : Cymru ac Ewrop /
Hayman, Peter.
Hume, Rob.
Pwllheli : Gwasg Carreg Gwalch,
2004.
Argraffiad Saesneg gwreiddiol = Original English edition : London : Mitchell Beazley, 2002.
Addasiad Cymraeg gan = Welsh adaptation by : Iolo Williams.
Birds
Birds
Birds
Birds