Booming bitterns are bouncing back
Posted Fri, 02 Sep 2011 18:23:00 GMT by Ruth Hendry
Britain's loudest bird is making a comeback. A relative of the more commonly seen grey heron, the highly secretive bitterns spend most of their time hidden in reed beds, making them incredibly difficult to survey by sight alone. Luckily for scientists, male bitterns have a unique booming call which they create by filling their gullets with air and then releasing it.
Booming bitterns are bouncing back