American Robin
James C. Leupold - USFWS

Today's News
Today's News

Spring's Journey North
Spring's Journey North
Report Your Sightings
Report Your Sightings
Teacher's Manual
Teacher's Manual
Search Journey North
Search Journey North
return to:
JNorth Home Page
A/CPB Home A/CPB

Challenge Question #11

susamel@juno.com
Sun, 29 Mar 1998 23:47:46 -0500

We don't think robins go further north than places that reach the 36
degree isotherm.. When you go into the Northwest Territories and further
north, you are in a Tundra Biome where the ground is permafrost. The
factors that influence the northern limits of their nesting range are
cold temperatures and no food. It is so cold, that the ground is
permanently frozen. Worms could not dig out here and plants cannot grow.
Without plants, there are no berries and the insects that eat the plants
cannot live. Therefore, the robin could not survive.

Rose Wong
Iselin Middle School

_____________________________________________________________________
You don't need to buy Internet access to use free Internet e-mail.
Get completely free e-mail from Juno at http://www.juno.com
Or call Juno at (800) 654-JUNO [654-5866]