At work recently,we have been fortunate enough to watch a brood of blackbirds developing outside the canteen window ,in a heap of pallets.Yesterday they fledged and one by one were scattered about the site.The parents are very used to disturbance from us and even stayed when some of the pallets were removed ?.I went to pick up some kit yesterday and was just shutting up the office when the local birdlife suddenly called the alarm and took to the air ,a sure sign of winged predator about .I scoured the sky for it but wasnt ready for what happened .A sparrowhawk came from out the sun over my hea