If you want to find out, first of all you need to locate a male nightjar. According to the RSPB there are just 4,606 of them in the UK between May and August. They sing at night and like heathland - which is not necessarily the easiest surface to walk over in the dark. But the heath at Gwaith Powdwr has smooth pathways and a guide, Rob Booth, to take you to the right spot at the right time without scaring the birds away.
Rob will be leading a nightjar walk on Saturday 30th June and on Friday 6thJuly starting, presumably from the entrance to Gwaith Powdwr, at 8:30pm. There is a charge of £2 for members of North Wales Wildlife Trust (NWWT) and £4 for non members. Please call Rob or the NWWT office on 01248 351541 if you would like to take part.
If you can’t make it, turn off your lights, close your eyes, turn up the volume and listen to the film above. The birdsong and call is courtesy of BirdVoice which produces great products for people like me struggling to make sense of who is singing what.