Did you know there are up to 5 different species of bat living in the forest? You can see them flitting around after dusk in the summer months, especially close to the river.
Want to hear the sounds a bat makes?
Click here to download and hear an audio clip of 4 Pipistrelles just after they emerged for the evening, foraging for food over the river and among the trees along the river edge during the a hot spell of weather.
Audio: Jerry Sorfleet
Image: CC by-SA 3.0
The Pipistrelle is the smallest and most common bat found in Britain - it weighs less than a 2 pence coin.
Image: CC BY-SA 2.0
You will notice these bats skimming over the surface of the river
Image: BBC Nature
Britain's largest bat and usually the first to fly in the evening.