There are three Bihus, each one marking a distinct phase of the annual rice-farming calendar and they are held at three different times of the year.
The The songs are mostly based on the theme of love and often carry erotic overtones.
Bihu dances are extremely energetic and feature both young boys and young girls, although they tend to stay in their separate groups.
The dances are charactised by brisk steps, stylish footwork, the flinging and waving of hands and the erotic swaying of hips to represent youthful passion.
This festival is closely related to the Tantric cult and is also known as Kamakhya Devi Puja.
It is believed that Goddess Kamakhya goes through her menstrual cycle during this time and for three days the doors to the temple are kept closed because the earth is impure.
Ambubachi Mela is celebrated at the Kamakhya temple on the fourth day when thousands of devotees from all over India and abroad are once again allowed to enter the temple for worship.
When the doors are finally opened the devotees charge through hoping to receive Bihu is the most important and widely acknowledged festival in Assam and is celebrated with joy and abundance by everyone irrespective of caste, creed, religion, faith or belief.
Assam is a land of fairs and festivals and the majority characterise the spirit of accommodation and togetherness of the diverse faiths and beliefs found there.
This perfect fusion of heritage shared by the numerous races living in Assam has made it home to the most colourful festivals and reflects the true spirit, tradition and lifestlye of its people.