pond skaters, whirligig beetles and great diving beetles. Other creatures might then arrive, such as leeches, frogs, dragonflies and ducks. For some of this pond life, a temporary home suits their ...

As we tidy away the Dracula capes and glow-in-the-dark plastic fangs for another winter, one notorious blood sucker has had a particularly good year. For the first time the medicinal leech Hirudo ...