Ydych chi wedi meddwl erioed beth yw’r smotiau bach du sy’n troelli ar wyneb y dŵr mewn pwll? Wel chwilod chwyrligwgan! Maen nhw i’w gweld yn aml yn saethu ar draws wyneb y dŵr yn hela eu pryd…

Mae gwenoliaid duon yn treulio’r rhan fwyaf o’u bywydau yn hedfan – gan hyd yn oed gysgu, bwyta ac yfed wrth hedfan – gan lanio i nythu yn unig. Maen nhw’n hoffi nythu mewn hen adeiladau mewn…

Pe baech chi’n codi carreg yn yr ardd, gobeithio y byddech chi’n dod o hyd i lawer o wrachod y lludw. Mae gan y trychfilod gwydn yma arfogaeth fewnol ac maen nhw’n hoffi cuddio mewn llecynnau…

Meadow buttercup is a tall and stately buttercup, with buttery-yellow flowers that pepper meadows, pastures, gardens and parks with little drops of sunshine.

Violet ground beetles are active predators, coming out at night to hunt slugs and other invertebrates in gardens, woodlands and meadows.

The waxwing is a colourful winter visitor. It can often be spotted in large flocks in berry-laden bushes in towns, car parks and gardens.

Gellir gwełd y chwilod mawr, brown yma’n heidio o amgylch golau stryd yn y gwanwyn. Maen nhw’n byw o dan y ddaear fel larfa am flynyddoedd ac wedyn yn dod allan fel oedolion, mewn niferoedd mawr…

A fleshy herb of the wet margins of brooks, streams and ditches, Brooklime can be seen all year-round and provides shelter for tadpoles and sticklebacks.

The Common walnut tree produces a large, brown nut that is familiar to so many of us. It is an introduced species in the UK, and can be seen in towns, gardens and parks.

A beautiful, tiny fungus, green elf cup can be commonly found on the decomposing wood of deciduous trees in woods, parks and gardens.

An attractive, olive-green bird, the greenfinch regularly visits birdtables and feeders in gardens. Look for a bright flash of yellow on its wings as it flies.