The above image was taken on foot by carefully approaching the Common Kestrel slowly without disturbing it.
The following will help in approaching Birds better without disturbing them.
1. Spend time in the field and locate the places where birds often come.
2. Wait near those places patiently with the equipment ready.
3. Camouflage clothing including a Camouflage Hat helps in better approaching the birds.
4. One can use Bird Hides as well without destroying the habitat.