Mae 'gwenyn unigol' yn digwydd yma ac acw ar y we (e.e. www.rspb.org.uk/hfw/factsheets/hfw30c.pdf), a dyna ddefnyddies i yn ddiweddar wrth sôn amdanyn nhw.

From: Discussion of Welsh language technical terminology and vocabulary [mailto:[log in to unmask]] On Behalf Of Sian Roberts
Sent: 19 Chwefror 2015 13:33
To: [log in to unmask]
Subject: solitary bee

Solitary Bees (Hymenoptera)

There are more than 200 species of solitary bee in Britain. They are so named because, unlike honeybees and bumblebees, they do not live in colonies. 

Rhywun yn gwybod?

Diolch

Siân