First frogspawn

16 February

First male adder

4Mar

First female adder and slow-worm

16 March

First common lizard

25 March

First grass snake

2 April

First grass snake copulation

Not seen

First male adder slough

19 April

First adder courtship and combat

24 April

First adder mating

25 April

Last adder courtship

2 May

Last adder

5 October