Thankfully I am not out in the field today! I went last night and was out there for a bit over two hours either side of sunset. At the start there was all kinds of noise from the birds (cockatoos and lyrebirds maybe, I'm not sure) and I got so absorbed in what I was doing that suddenly they had all fallen silent without me noticing! Good results too, actually saw more there than I have in the day, even though it was too dry for snails to be active.