This video from Britain says about itself:
Fulvous Whistling Duck at Gothian Sands in Cornwall
Filmed on May 15th 2016
Video Produced by Paul Dinning – Wildlife in Cornwall
Fulvous whistling ducks are tropical birds.
The video also features Canada geese and singing skylark sound.
Dear Kitty. Some blog 
Tropical birds, but not unknown in the UK as captive birds. There are some at WWT Barnes for example, and maybe at other WWT locations. Thanks for the black-bellied WD links! RH
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My pleasure 🙂 Maybe that duck in Cornwall had escaped.
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