Signs of a British spring including spawning frogs, the arrival of migrating swallows and the first leaves on oak trees took a week longer to spread across the UK this year than in the last two decades, according to nature watchers.
A mild winter saw spring flowers out earlier than usual, and signs of spring such as hawthorn leafing and red admiral butterflies on the wing on Christmas Day.
Lower than average temperatures in April, however, meant that the ecological heralds of spring travelled from south to north more slowly than in recent years. They took four weeks to travel the length of the UK, compared with three weeks last year.
The Guardian: Spring spread more slowly across UK in 2016 – Woodland Trust
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