A crouched blackbird on the ground by a hedge calling with its high pitched alarm call (seee!) alerted me to the presence of a bird of prey. I looked up to the trees in the park and distinguished the silhouette of a Sparrowhawk. There were two, and they flew chasing each other and landing in different trees. They repeated the chase and land several times. It had started to rain, but I managed some record shots and in them I saw that there were male and female. I based this sketch on the shots of the female.