Bat Night

At last I managed to get out with this years  Christmas present the Bat Detector, Sands Lane was the destination but the birds came first with this years Patch firsts Sand Martins there were only a handful but there they where, also present a pair of Tufted Duck, Goosander, Mute Swan, Canada Goose, Chiffchaff, Robin, Blue Tit and a few Mallards. At a about 8:30pm my wife caught the glimpse of a small bat passing by the car out I got Bat Detector on and then a wait of a couple of minutes and I heard my first bat, the frequency was 45kHz so with this, the size and place  I believe I heard my first Common Pipistrelle, but much to learn,  I have now a few more questions  that need answering a few bat walks with the experts are in order I think.