Around the reservoir at Mapperley, there are several old hedges, constructed by 'laying' the Hawthorn and Blackthorn bushes. Straggling through these hedges, there are at the moment, lots of Black Bryony (Dioscorea communis) plants. A member of the Yam family, it is quite common in the UK.
Potentilla reptans). This plant belongs to the rose family.
Pica pica) was the culprit, peering in through the window at me.