Addiction is, according to an online dictionary definition, a medical condition that is characterized by compulsive engagement in rewarding stimuli, despite adverse consequences. It can be thought of as a disease or biological process leading to such behaviours.
So are those of us who expend countless hours searching out and observing the enigmatic Vipera berus thus afflicted? Adderholics?
Locally, that is to say the Humberhead Levels supports a reasonable population of the reptile. But with increased pressure from Open Access and engineered management works currently being undertaken on Thorne & Hatfield Moors the population is potentially at risk.
The Adder, the UK’s only venomous snake is a reptile favouring open predominantly dry habitats. Heathland and commons, moorland, sea cliffs and chalk downland, open woodland and woodland rides, road and rail embankments are also used.
The images above of a male adder show two key aspects, namely the dark rostal and its head pattern – a unique feature to all individual adders. Images: H R Kirk.
The image above shows the general colour difference between the male and female adder. Note also the paler brown as opposed to dark rostal indicative of a male adder. Image courtesy of Martin Warne.
The two images above show (left) a female adder approaching sloughing, indicated by the opaqueness of its eye and (right) a sloughed skin discarded amongst vegetation. Images: Martin Warne (adder) & H R Kirk (sloughed skin).
Examination of local historical data (pre 2000) and moderately recent data appears to indicate a decline in adder numbers. As Thorne Moors particularly becomes wetter through the implementation of a Water Level Management Plan currently being delivered by Doncaster East IDB and Hatfield Moors is the focus for increased public access, what are the ‘new’ or ‘modern’ implications for this sensitive species? What monitoring is being undertaken by either of the Public Bodies currently undertaking significant management works?
Nationally too there is concern about decline in adder populations, see abstracts from Herptofauna Workers Meeting 2013 via http://www.arc-trust.org/pdf/hwm2013-presentation-abstracts.pdf
The photographs above were taken using a zoom lens. The adders were not disturbed. The interests of the adders, a protected species must come first.