Marsham's 27 indications of spring

Started in 1736 when Robert Marsham was still a young man, and continued by his family until 1958, these provide unique records of springs between those years and how they related to the weather, showing us just how responsive spring events are to temperature, and warning us that not all species respond at the same rate. They recorded:

Snowdrop first flowering
 
Wood anemone first flowering
 
Hawthorn first flowering
 
Turnip first flowering
 
Hawthorn first leafing
 
Sycamore first leafing
 
Silver birch first leafing
 
Elm first leafing
 
Rowan first leafing
 
Oak first leafing
 
Beech first leafing
 
Horse chestnut first leafing
 
Sweet chestnut first leafing
 
Hornbeam first leafing
 
Ash first leafing
 
Lime first leafing
 
Field maple first leafing
 
Swallow first seen
 
Cuckoo first seen
 
Nightingale first heard
 
Nightjar first heard
 
Song thrush first heard
 
Ringdove first seen
 
Rook first nest building
 
Rook young first seen
 
Brimstone butterfly first seen
 
Frogs and toads first heard croaking