Explanation:

The hornbills are a family of birds found in tropical and subtropical Africa and Asia. 

• India is home to nine species of hornbills.
• The northeastern region has the highest diversity of hornbill species within India. 
• Hornbills are the cultural symbols of some ethnic communities in the northeast, specifically the Nyishi of Arunachal Pradesh.
• The Hornbill festival celebrated in Nagaland is named after the bird – Hornbill which is the most revered and admired bird for the Nagas. 
• Hornbills have a symbiotic relationship with several canopy trees in tropical forests. The forest patches that have rare trees like Canarium, attract hornbills in large numbers (for food).
• In turn, hornbills end up dispersing seeds of a diverse array of plant species in higher numbers in these patches

Hence only statement 1st is correct.