Our Year 5s spent the day with The Boxmoor Trust https://www.boxmoortrust.org.uk/ studying the River Bulbourne. This is a rare chalk stream that flows through Boxmoor, joins the River Gade, then the River Chess before joining the Thames. Our Year 5s did a variety of tests to see what the water quality was like. The water was clean, relatively unpolluted and teemed with life. Each time we visit we find a greater variety of creatures. One highlight today, caught by Gordey, was a bullhead – a type of fish that lives in shallow free flowing water that has to be of good quality. Not such good news was the fact that we also caught some crayfish – not the native species unfortunately, but the American invader, the signal crayfish. All in all the River Bulbourne is in good health. The pupils also mapped the profile of the river bed. This showed some human influence – man made banks and cattle accessing the river. Many thanks to Caroline and Jackie for a fantastic day.