The first day of the festival is called Kag Tihar or Kag Puja (worship of the crows). The crows are worshiped by offerings of sweets and dishes on the roof of the houses. The cawing of the crows symbolizes sadness and grief in the Hindu mythology, so the devotees offer the crows food to avert grief and deaths in their homes. Tihar in Nepal and Diwali in India represent the divine attachment between Human and other animals and birds in our nature.We worship crow before having our meal.We feed the crow during this day as god. To strengthen the worship of nature, all these rituals are introduced in Hinduism.
Read more about this topic: Tihar (festival)