Yn gwibio o gwmpas y tŷ yn yr haf, mae'r copyn heglog, brown yn gyfarwydd i lawer ohonom. Mae’n ffynhonnell fwyd werthfawr i lawer o adar.

This brown seaweed lives in the lower shore and gets its name from the serrated edges to its fronds.

This stocky, brown mammal spends its life burrowing underground with its spade-like paws, hunting for earthworms to eat.

Found almost everywhere, the large yellow underwing is a night-flying moth that is often attracted to lights. It is brown with orangey-yellow hindwings.

Flitting about the house in summer, the gangly, brown daddy longlegs is familiar to many of us. They are a valuable food source for many birds.

Like many of our farmland birds, the yellowhammer has declined in number in recent years. Spot this bright yellow bird singing from the top of a bush or fence, or in a mixed-species flock in…

This brown seaweed lives in the mid shore and looks a bit like bubble wrap with the distinctive air bladders that give it its name.

Mae tylluanod brech yn dylluanod brown cyfarwydd yng nghoetiroedd, parciau a gerddi Prydain. Maent yn cael eu hadnabod am eu cân ‘tŵ-wit tŵ-hŵ’ sydd i’w chlywed yn ystod y nos.

The spiked shieldbug has fearsome shoulder projections or 'spikes' and a predatory nature. This brown bug feeds on caterpillars and other insects in woodlands and on heathlands.

Listen out for the 'chattering' song of the reed warbler, while wandering the UK's lowland wetlands in summer. A small, brown bird, they are quite hard to see.