Coimbatore, July 28 (ANI): Students of a school in Tamil Nadu formed a human chain to observe International Tiger Day and create awareness among people of the nation about decline in the number of the striped beauties by drawing tigers on the floor with the help of coloured powder. Over 800 students of Sarvajana School in Coimbatore formed a human chain saying, _We Want Tigers_. The students also raised slogans to save tigers. The school had held _Save Tiger_ Rangoli contest on the occasion of International Tiger Day which is celebrated on July 29 worldwide.