Once the weather finally makes up its mind to be warm for more than a few hours, have a look for this butterfly, the Speckled Wood, Pararge aegeria.
It’s quite a common butterfly and should be out and about in the beginning of April. Like many of the browns, it tends to breed on grasses, and this one likes soft grasses in dappled shade. In Daventry there will usually be quite a few along the old railway track and in the country park. The sunlight usually picks up their distinctive yellow spots (numbers and markings vary) and often several will be seen having a bit of a tussle in the air.