Petty spurge is found on cultivated ground, such as gardens, fields and waste ground. It displays cup-shaped, green flowers in clusters and oval, green leaves.

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!

A tall and robust species of sedge, the Great fen-sedge has long leaves with sawtooth edges. It forms dense stands in lowland fens and around lakes.

Creeping buttercup is our most familiar buttercup - the buttery-yellow flowers are like little drops of sunshine peppering garden lawns, parks, woods and fields.

Fat hen is a persistent 'weed' of fields and gardens, verges and hedgerows. But, like many of our weed species, it is a good food source for birds and insects.

The scarlet pimpernel is now in decline due to intensive agricultural practices. It can be found in arable fields, on roadside verges and waste ground, and on coastal cliffs.

The extensive, golden-brown reedbeds that are formed by stands of Common reed are a familiar sight in our wetlands. They provide an important home for many species, including the rare Bittern.

A classic fern of woodlands across the UK, the male-fern is also a great addition to any garden. It grows impressive stands from underground rhizomes, dying back in autumn.

Nudibranchs, also known as sea slugs, are much like their land-based relatives that you may spot in your garden. But, unlike your regular garden slug, the nudibranch can incorporate the stinging…