1. Sweater
Mornings and evenings are usually cold, so carry a sweater and a light jacket
2. Raincoat / Umbrella
Carry a raincoat/umbrella if you are traveling during monsoons (in-addition to the warm clothes)
3. Zoom tool
A binocular or a zoom-in camera to watch/capture the birds
4. Sole Protect
A pair of sneakers or floaters with good sole grip
5. Backpack
A small backpack during trekking