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.

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!

Wasps are well-known, and unfortunately not very well-loved! But give these black and yellow guys a chance, as they are important pollinators and pest controllers.

Our only venomous snake, the shy adder can be spotted basking in the sunshine in woodland glades and on heathlands.

A 'weed' of cultivated and disturbed ground, Round-leaved fluellen is a trailing plant with round leaves and yellow flowers that appear over summer.

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.

This common hoverfly can be recognised by the dark markings behind its head, which often resemble the Batman logo.

This glossy wading bird is a scarce visitor to the UK, though records have become more common in recent decades.

The hen harrier has been severely persecuted for taking game species and has suffered massive declines in numbers as a result. Thankfully, conservation projects are underway to reduce conflict…