I have been observing Indian Grey hornbills, Oriental pied hornbills as well as Great hornbills in various National Parks of India right from 2004 but the activities of most common hornbill namely, the Indian Grey hornbill (Ocyeros birostris ) that is also found in urban environment hooked me when I went through the literature. From then I have been closely observing its behaviour in heart of Delhi for more than 3 years.
There are 54 varieties of hornbills in the world. India has 9 species of these beautiful birds. Out of 9, two appears in the list of ten threatened hornbills of the world. In India, most of these are concentrated in north- east.
Species which are found in India are:-
1. Indian Grey Hornbill 2. Great Hornbill 3. Malabar Grey Hornbill 4. Malbar pied Hornbill 5. Oriental pied Hornbill 6. Brown hornbill 7. Rufuous necked hornbill 8. Wreathed Hornbill 9. Narconda Hornbill.