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…

The river lamprey is a primitive, jawless fish, with a round, sucker-mouth which it uses to attach to other fish to feed from them. Adults live in the sea and return to freshwater to spawn.

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

The rare wildcat is so similar to a domestic tabby that interbreeding is a serious threat to its survival. Although known as the 'tiger of the Highlands', it is shy and elusive, making…

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

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,…

It’s easy to see where these butterflies get their name – the males have bright orange tips on their wings! See them from early spring through to summer in meadows, woodland and hedges.

The common osier is a small willow tree that is found in fens and ditches, and on riverbanks. It has been widely cultivated and coppiced for its twigs, which are used in traditional basket-making…

The UK's smallest whale, the minke whale, is notoriously inquisitive around boats and is even known to breach clear of the water. Beware though - their fragrant breath has given them the…