Bluebells are flowering earlier than usual.
Swallows are returning to the UK ahead of schedule.
Orange-tip butterflies are being spotted earlier in the season.
Strategic angle: Citizen science data reveals early flowering, nesting and insect activity as global heating accelerates seasonal change.
Bluebells are flowering earlier than usual.
Swallows are returning to the UK ahead of schedule.
Orange-tip butterflies are being spotted earlier in the season.