Woodland Trust

Nature's CalendarNature Detectives

Look out for bare silver birch trees and record them with Nature's Calendar

Swallow. moorhen.me.uklast recorded

The date on which you last see the bird before it leaves for other climes.

As the departure time gets closer keep a note of the dates when you do see the birds.

Do this until you no longer see them and then you have your ‘last recorded’ date.