While in Suffork visiting RSPB Minsmere i went to Frederick’s Mount woods which large space between the trees – wait a while for sundown and dusk to come, finally mass churring started then they appeared at least 10 as they most flew 2 to 6 feet of the ground zooming across the space as if jet fighter – After i through i was tracting a nightjar high and as i pressed it turn on penny heading for the ground, so after just 3 shots i gave up attemping to take Pic’s and listen to their bleeping sounds and wing clapping as they past…