A swan who fell in love with a swan-shaped paddle boat has been moved to a zoo with his plastic lover.
Biologists in Muenster, north-western Germany, say the rare Black Australian Swan has been showing all the typical signs of love for its species, circling its plastic lover, staring endlessly at it and making crooning noises.
The swan now refuses to fly south for winter without his mate.
Park keepers say that 'Black Peter' as the lovesick swan is known, refused to leave the boat on the Aasee Lake - which also should be taken off during the cold weather.
Boat-owner Peter Overschmidt has agreed not to lock his boat away for the winter.
He said: "When you see how Peter circles the swan boat you know there could be no other option, it's the centre of his life."
Hearing about Peter's plight Allwetter Zoo then agreed that both Peter and the boat could spend the winter on their pond near the elephant enclosure, which is more protected from the elements than the lake.