Mae pawb wrth eu bodd yn gweld cwningod yn sboncio drwy laswellt tal wrth fynd am dro yng nghefn gwlad. Mae’n olygfa gyffredin ond mae bob amser yn bleser gweld eu hwynebau chwilfrydig yn codi i’r…

Although introduced by humans, the fallow deer has been here so long that it is considered naturalised. Look out for groups of white-spotted deer in woodland glades.

Introduced from Japan in the 19th century, Japanese knotweed is now an invasive non-native plant of many riverbanks, waste grounds and roadside verges, where it prevents native species from…