COUNTRYSIDE COUNCIL FOR WALES
SITE OF SPECIAL SCIENTIFIC INTEREST: CITATION
ANGLESEY LLYN TRAFFWLL
National Grid Reference: SH325770
Site Area: 44.8 ha
Llyn Traffwll is primarily of biological interest. It is an example of a moderately base-rich lake and the aquatic flora includes characteristic species such as lesser pondweed Potamogeton pusillus and spiked water-milfoil Myriophyllum spicatum. Among the rare and uncommon species that have been recorded are the eight-stamened waterwort Elatine hydropiper and flowering rush Butomus umbellatus. A smaller area of open water with associated reed, swamp and willow carr is also included.
This lake is also important for overwintering wildfowl, notably shoveler whose numbers frequently represent more than 1% of the British total. A variety of other species also occur including wigeon, mallard, gadwall, goldeneye, pochard and tufted duck.