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Welcome Spring!
Earthworms and Robins Return

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The arrival of the first robins is a welcome sign of spring, and is often closely tied to the appearance of the first earthworms.
Here They Come! The arrival of the first robins is a welcome sign of spring, and is often closely tied to the appearance of the first earthworms.

During winter most earthworms stay in their underground burrows. They are prisoners in frozen soil under ice and snow.
Buried Below During winter most earthworms stay in their underground burrows. They are prisoners in frozen soil under ice and snow.

In the spring, earthworms move upward after the ground thaws. Earthworms travel only a few feet during this migration.
Verticle Migration In the spring, earthworms move upward after the ground thaws. Earthworms travel only a few feet during this migration.

"When spring comes and frost leaves the soil, the earthworms become migrants, tunneling upward. They appear at the surface, leaving the first castings of the new season, as soon as the average temperatures of the ground reaches about 36 degrees. At the same time, the robins return from the south." From North With the Spring by Edwin Way Teale.
Spring Connections "When spring comes and frost leaves the soil, the earthworms become migrants, tunneling upward. They appear at the surface, leaving the first castings of the new season, as soon as the average temperatures of the ground reaches about 36 degrees. At the same time, the robins return from the south." From North With the Spring by Edwin Way Teale.

As temperatures rise, watch for these signs of spring in your backyard. Which will appear first, a worm or a robin? Will they appear together when the average temperature reaches 36 degrees?
Watch Your Backyard As temperatures rise, watch for these signs of spring in your backyard. Which will appear first, a worm or a robin? Will they appear together when the average temperature reaches 36 degrees?

When your earthworms and backyard robins return, report to Journey North. You'll know your robin has arrived when you hear it sing.
Report Your Sightings! When your earthworms and backyard robins return, report to Journey North. You'll know your robin has arrived when you hear it sing.

The Annual Cycle of the Monarch Butterfly

Essential Question
How is robin migration related to the
return of earthworms in the spring?

The arrival of the first robins is a welcome sign of spring, and is often closely tied to the appearance of the first earthworms. Find out how the two are connected.

 

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