Tansy is an aromatic plant of rough grassland, riverbanks and verges that has button-like, yellow flower heads. It is the main foodplant of the rare Tansy Beetle, now found at only two places in…

Mae'r siarc main yma’n cael ei enw o'r pigau o flaen ei asgell ddorsal. Gall ddefnyddio'r pigau yma i amddiffyn ei hun drwy gyrlio mewn bwa a tharo ysglyfaethwr.

Growing in tufts, Crested dog's-tail is a stiff-looking grass, with a tightly packed, rectangular flower spike. Look for it in lowland meadows and grasslands.

A small, tufted fern, maidenhair spleenwort can be found growing out of crevices between rocks, in walls and on mossy branches across the UK.

Mae mor hawdd methu’r gwyfyn bach clyfar yma. Mae’n feistr ar guddio’i hun, gan gyfuno’n berffaith gyda choed gan ei fod yn edrych yn union fel brigyn bedwen! Yn hedfan yn ystod y nos yn unig, mae…

The Alder fly is a blackish invertebrate, with delicately veined wings that it folds over its body like a tent. It can be found near ponds and slow-flowing rivers; the larvae living in the silt at…

This large, fluffy-looking moth is on the wing in July and August, but you might spot a caterpillar at almost any time of year.

The porbeagle shark is a member of the shark family Lamnidae, making it one of the closest living relatives of the great white shark.