Llun: 1
Severn, spartina advance

Caldicot Pill, wood + stone groyne suggests silting is more on upstream side 20.2.71

Dyddiad: 20/02/1971

Llun: 2
Reen clearance

Caldicot levels. Newly cleaned reen leading from Phragmites swamp. Kingfisher here on 20 February 1971

Dyddiad: 20/02/1971

Llun: 3
Reens, Canals, Pills, Grips

Caldicot levels, Severn Bridge. New cut reen. Sheep. 20/02/1971
Enw rhywogaeth Mary: Ceratophyllum demersum
Enw gwyddonol: Ceratophyllum demersum
Enw cyffredin: Rigid hornwort

Dyddiad: 20/02/1971