Otmoor is a great place for seeing brown hares. They are very active at this time of year and with the grass being so short in the fields at the moment you can often get really good views of them. Saying that though, they can also be very very good at hiding, hunkering down and sitting very still until you get very close to them. This happened to me yesterday out in the Big Otmoor field... Can you spot the hare in the photo below? You might need to click on the picture to enlarge it.
Here's another photo of the same hare in its camouflaged position, sitting tight to try avoid detection. Habitat loss has resulted in an 80% decline in hare numbers since the 1800's, so we're lucky to have a healthy population on the moor.