Cadwch lygad am y glöyn byw bychan, Glesyn y Celyn, yn eich gardd neu barc lleol. Dyma'r glöyn byw glas cyntaf i ymddangos yn y gwanwyn, ac mae ail genhedlaeth yn ymddangos yn yr haf. Mae…

Mae'r trilliw bach tlws yn ymwelydd gardd cyfarwydd sydd i'w weld yn bwydo ar flodau drwy gydol y flwyddyn yn ystod cyfnodau cynnes. Gall oedolion sy'n gaeafu ddod o hyd i fannau…

This large green moth rests with its wings spread, so is sometimes mistaken for a butterfly.

This metallic green beetle can be seen visiting flowers on sunny days in spring and summer.

A diminutive but aggressive predator, the three-spined stickleback hunts tadpoles and small fish. It is also known for fiercely protecting its nest of eggs until they hatch. Look for it in ponds,…

Mae’n hawdd iawn methu’r glas y dorlan trawiadol heb fod yn wyliwr craff iawn! Mae’r aderyn hardd yma’n hawdd ei adnabod diolch i’w liwiau glas llachar a chopr metalig. Mae’n gwibio ar hyd glan yr…

Mae môr-gyllyll yn perthyn i ystifflogod ac octopysau – grŵp o folysgiaid sy’n cael eu hadnabod fel seffalopodau. Efallai eich bod chi wedi gweld y gragen fewnol sialcog, o’r enw asgwrn cyllell,…

The eel is famous for both its slippery nature and its mammoth migration from its freshwater home to the Sargasso Sea where it breeds. It has suffered dramatic declines and is a protected species…

With its prominent, wavy crest, the great crested newt, also known as the 'warty newt', looks like a mini dinosaur! This protected species favours clean ponds during the breeding season…

The rare Slavonian grebe is an attractive diving bird with distinctive, golden ear tufts that give rise to its American name - 'horned grebe'.

Sea lettuce is unmistakeable - most often a bright green and always translucent, it is found on all UK coasts.