A sure sign that spring has arrived, the Cuckooflower blooms from April. Look out for its delicate, pale pink flowers in damp meadows and ditches, and on riverbanks.

This small, white heron is an increasingly common sight in parts of the UK as it spreads north from continental Europe.

This small, round sea urchin is (unsurprisingly!) green in colour and can be found on rocky shores around the UK.

Despite its dazzling colouration, this fabulous nudibranch can be easily missed, due to its small size!

Er ei fod braidd yn swil, mae’r mamal morol rhyfeddol yma i’w weld yn agos at y lan mewn dyfroedd bas. Os byddwch chi’n llwyddo i fynd yn agos ato, cofiwch wrando am y sŵn ‘pwffian’ uchel mae’n ei…

This large shrike visits the UK in small numbers each year, passing through on migration or spending the winter here.

This small finch nests on moorlands and coastal crofts, spending the winter on the coast. The UK population has declined dramatically.

This small duck is an uncommon winter visitor to the UK, where they're usually found on lakes, reservoirs and gravel pits.