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Phenology for April: A Reminder

Today's Reminder Includes:

  • How the Season is Changing >>

  • Outdoor Observations for April: Tune Your Ears! >>

  • What's Happening to the Sunlight? >>
  • Phenology Resources to Explore >>


What clues can you find?
>>
Photo: Ann Cook

How the Season is Changing

Fuzzy pussy willows, kids playing outdoors with no coats, worms wriggling in mucky mud. These are just a few of the sightings reported by sharp-eyed observers this month. But some of the most exciting spring signs are ones you don't even see! Explore more in Outdoor Observations for April (below). Then go outside and look, smell, feel, and listen carefully.

What clues tell you that the season in your hometown is changing? Pay special attention to what's happening to the sunlight and daylength.

Outdoor Observations for April: Tune Your Ears!
This noisy spring peeper is barely as long as a paper clip!
"The sound is lovely, rising and falling in volume as the wind shifts and singers drop in and out of the chorus," writes one Journey North observer. A concert? No, she was describing the sound of thousands of tiny chorus frogs and spring peepers!

What have you heard this spring? When you make your April observations and fill
in your checklists, try to be spring sound sleuths!
  • Sounds of Spring: Go outside with a journal or notebook. Find a spot to sit still for 5 or 10 minutes. Close your eyes and open your ears. What sounds do you notice? Next, write a description of each sound and what you think caused it. (A buzzing bee? Scurrying squirrel? Squishing mud? Dripping water?) Which of these are mainly spring sounds? Explain why you chose those.

  • Animal Sound Tracker: Track down three wild sounds until you find the animals making them. (No fair tracking dogs or cats!) Observe the animals for as long as you can. In your journal, describe the sounds as well as you can. Also record what you see the animals doing while they're making the sounds. Try to record the date, time, weather conditions, location, and habitat for each sighting.
What's Happening to the Sunlight?

Are you tracking sunrise and sunset times, daylength, or shadows in your hometown? What have you noticed? These things continue to change very quickly! How do they affect the progress of spring?

Imagine you're in space looking at Earth on the morning of April 1. >>


How is sunlight changing? >>
Phenology Resources to Explore
  • Spring Checklist: Grades K-3 >>
  • Spring Checklist: Grades 4+ >>
  • Student Journal: Signs of Spring >>
  • Signs of Spring: You can post your observations on one of our migration maps or the "other signs of spring" map.
  • Share: Exchange Observations with a Partner! >>
  • Observation: How is sunlight changing? >>
  • Sound Clips: Red-winged Blackbird Vocalizations >>
  • Tool: Sunrise/Sunset Tables >>
  • Teachers: Phenology and Journey North >>
Keep observations, drawings, and checklists in easy-to-print Signs of Spring journals.
Phenology for March: A reminder will be posted on
May 1, 2008


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