The bitterns which I remember so well from my younger days at Leighton Moss, started breeding again in 2018 after an absence of over a decade. 2019 sees a breeding bird very close to lower hide. A few issues, including the fact that the best views are normally obtained from the couple of windows at the right hand side- is that photgraphers - including myself, can become easily distracted by the cute chicks running around infront of the hide https://www.stevelaycock.com/leighton-moss