We do not know much about how frogs are classified, but we have seen a few kinds in nature and heard of many: the toad, the kola frog, the golden frog. Yet few of us can recall ever seeing a yellow frog. Now yellow frogs have come to light.

The surprising sight was spotted in Narsinghpur, Madhya Pradesh, India, and the pictures have already spread from hand to hand. Praveen Kumar Kaswan, an official of the forest department there, shared the video. It shows several yellow frogs hopping about and croaking in their familiar voices.

Praveen Kumar Kaswan said: "This is nothing unusual. Male frogs change colour like this in the monsoon, because this is how they attract female frogs. These frogs are seen turning yellow during the first rains of the monsoon. Such a sight can be seen in village fields."

The forest department said these frogs are called the Indian bullfrog or Indus Valley bullfrog. According to JME Science, bullfrogs change colour like this in the monsoon; when they turn from green to yellow, their vocal sacs turn blue. Brightly coloured males are thought to be more attractive to females.

The Indian bullfrog is also found in Bangladesh, Afghanistan, Myanmar, Nepal, Pakistan and Sri Lanka. It prefers wet places, though not the coast; it likes water bodies such as ponds. The sight has naturally surprised many people, but it is not an unusual occurrence.

Source: Jagonews24. First published in Bengali on The Agro News.