I have just seen the first bats of the year, two of them flying around at the back of my flat. Unfortunately it was just too dark for taking photos. It was flying in roughly clockwise circles at about 12 to 15 m above the ground, actively hunting, wing span approximately 20 to 25 cm, the body appeared dark, I didn’t see any light patches on the body. First seen at 19:25. It was probably Pipistrellus pipistrellus or Pipistrellus pygmaeus.