Fly from Delhi to Dimapur, the commercial hub of Nagaland, the only city that has an airport in the state. Indigo operates direct flights on few days in a week.
Drive down from Dimapur to the roosting site at Pangti Village to witness the magic of the Amur Falcons. This can take anywhere between 5-7 hrs depending on road and weather conditions.
You can rest by the calm Doyang river where you will be camping to see various sights such as fishermen coming and selling fish, locals occasionally swimming (it's not advisable to swim, as the waters can be deep) and beautiful mountain views.
Head back to Kohima to rest the night. Next morning, you may head back to home or could do local sightseeing in the city: Visit the local market, Cathedral, State Museum, Zoo and much more.