A cow herd grazing on a field were baffled when a farm worker sang karaoke to them.

Footage shows the bovines looking confused and looking in the same direction towards the home Eruel Dela Carsada, in Otago, New Zealand, on September 25.

The animals stopped eating grass and were fixated as Eruel held a microphone by the window and sang a Filipino love song.

Eruel's amused wife Yuann laughed beside him and said in the video: ‘Oh look at them, they are watching you.'

Speaking after, Yuann said: ‘My husband was singing and noticed the cows were moving closer to our home to watch him. He was having a concert, and the cows were his audience.

'He performed confidently and the cows all had the same facial expression. It was hilarious.'