If you are in the habitat of this bird, then you just wait a little post dusk period, and you are getting the calls of this bird for sure. So when am surveying in scrublands, I always take my last transect and then wait for nocturnal birds; especially Nightjars. During this incidence, I heard the calls, me and my team waited patiently. We were immediately rewarded when the bird started its activities of catching insects, and there when it sat on the road/vehicle track, we had the bird in car's head light. This is when we had a small window to take record shots.
After taking the records, how did we drive when we had a bird sitting on a vehicle track? You just flicker your head lamps and bird flies away immediately. Well this is our experience with nightjar encounters and also with owls.
The Indian nightjar is a small nightjar which is a resident breeder in open lands across South Asia and Southeast Asia. Like most nightjars it is crepuscular and is best detected from its characteristic calls at dawn and dusk that have been likened to a stone skipping on a frozen lake - a series of clicks that become shorter and more rapid.