The male blue-footed booby sports a mating call that sounds like a fading whistle.
It's much more pleasant than that of the female booby - hers is more like a crow.
Taken on Espanola Island in the Galapagos Islands, Ecuador.
Read more about our eight days in the Galapagos Islands.
DPNblue footed boobyboobybirdEspanola IslandGalapagos IslandsEcuador