Spring is on its way! So here's a timely challenge to get your pupils outdoors enjoying the health benefits of fresh air and green spaces while tracking spring's vital signs. 

Climate change is already affecting our environment. Temperatures are rising, weather is more unpredictable and the seasons are shifting. We know that spring now arrives on average 8.4 days earlier than it did in the early 1990s. Are vital signs of spring changing too? We need your help to find out! 

This spring, let us know whether your school has spotted any of spring's three vital signs – frogspawn, a singing song thrush or flowering blackthorn. Your observations are worth two points on the Green Tree Schools Award

By completing this activity, your pupils will: 

  • learn about climate change and its impacts on wildlife
  • develop observation and data collection skills
  • experience the physical and mental benefits of spending time in nature. 

Submit your recording by 31 March 2025 to be eligible for points. 

How to participate

  1. Choose one or more of spring's vital signs to record from the list below. 
  2. Select a location for your observations (i.e. school grounds). 
  3. Submit your record using the form below. 

Important notes

  • You may record more than one vital sign, but please submit each one separately (the form only allows for one submission per record).
  • Your record must be submitted by 31 March 2025
A citizen science activity

Citizen science is where members of the public, like you, collect data and information for scientific research.

This activity is an opportunity for pupils to get involved in real-world science. 

Group activity at school 

Earn two points for the Green Tree Schools Award by completing this activity as part of a class project or eco club initiative. Pupils can work together to observe spring’s vital signs on school grounds or in the local community. Recordings can be submitted using the form below. 

Individual activity at home 

No points will be awarded for individual submissions. However, completing this activity at home still offers valuable learning experiences.

Pupils can observe spring’s vital signs at home, in nearby parks or on the walk to school. Recordings can be submitted using a separate form for individual submissions. 

Useful resources

Three vital signs of spring

Frogspawn - first seen

When to spot: January to April

Look for frog mating activity in ponds, ditches or slow-moving streams. The small black eggs are encased in a clear jelly and laid in clusters.

Record the first clumps of frogspawn you see.

Find out more about frogspawn
Frogspawn

Song thrush - first heard

When to listen: from early January

Slightly smaller than a blackbird with a dark-spotted underside and pale brown wings and back. The song thrush was once a common sight in UK woodland but is sadly in decline. Its song is varied, so listen out for short, repeated phrases.

Record the first time you hear a song thrush.

Find out more about the song thrush
Song thrush

Audio: Andrew McCafferty / xeno-canto.org

Blackthorn - first flowering

When to spot: mid-January to mid-April

Early to flower in spring, blackthorn trees have clouds of snow-white, almond-scented blossom which grows more fragrant on sunny days.

Record blackthorn's first flowering when the petals of the first flower are open sufficiently for you to see inside the flower.

Find out more about blackthorn
blackthorn flower

Too early

Blackthorn flowering

Just right

Blackthorn flower

Too late

How to claim your points

Your school will need to complete the activity by 31 March 2025. There's no need to email us to claim your points two points will be added to your account after 30 April 2025.

You must be signed up to the Green Tree Schools Award to get your points

Add your record

All fields are mandatory unless indicated as optional.

If you are not recording on behalf of a school, please use this form.

If you have more than one vital sign to record, you can submit multiple records.
Your details
Please enter the date you saw/heard your selected event.
Date of your record

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