The nursehound is a nocturnal predator, hunting smaller fish close to the seafloor.

This shiny beetle is common in wooded areas throughout the UK. As the name suggests, it specialises in hunting snails.

Stone curlews are unusual waders with large yellow eyes - perfect for hunting beetles at night.

A breeding bird of fast-flowing, upland rivers, the grey wagtail can also be seen in lowland areas, farmyards and even towns in winter.

The common octopus is a highly intelligent, active predator. It even has a secret weapon - special glands produce a venom that it uses to incapacitate its prey!

Selfheal is a low-growing, creeping plant that likes the short turf of grasslands, roadside verges or even lawns. Its clusters of violet flowers appear in summer.