Last Friday a small group of us, led by Neil Bedford, Senior Reserves Manager of Essex Wildlife Trust and a keen bat observer, set off expecting to wait for at least an hour before we registered our first bat on the detectors that we were carrying.
Neil stopped in the open area by the Memory Tree while it was still light and, while he was explaining details to us, first a serotine bat flew around, with its characteristic straight flight punctuated by dives when it was catching a moth, then a noctule bat flew across our patch of sky.
From then on, a bat circus seemed to happen! Common and soprano pipistrelles flew at head height around a bunch of saplings close to us, and the noctule and serotine carried on hunting. It was good to register the different frequencies on our bat detectors and to hear the feeding 'zips' when they ate a moth.
We weren't able to count exactly how many there were of each species, but at a guess at least 10 pips, and possibly 2 of each of the others. What a magic evening, the best yet, and all in low light so that we could see as well as hear them. Thanks to Neil for his enthusiasm and knowledge that helped to identify all that was going on.
We pushed our luck too far, by visiting the race around pond in the hopes of hearing daubenton bats, but I think the vegetation has covered too much of the water to be of interest to them.