The Lark was troubling and bothering the Kori Bustard which was walking in the grass. That was to protect its nest and the young ones or eggs. The Lark makes its nest in the ground and is very noisy and disturbs the birds or small animals that would be seen anywhere close to the nest. The Kori Bustard, incidentally too makes its nest on the ground amidst the tall grass. So here is a picture of two birds trying to protect their nests. It was a very interesting and a noisy moment in the bush.