Department of Energy Argonne National Laboratory Office of Science NEWTON's Homepage NEWTON's Homepage
NEWTON, Ask A Scientist!
NEWTON Home Page NEWTON Teachers Visit Our Archives Ask A Question How To Ask A Question Question of the Week Our Expert Scientists Volunteer at NEWTON! Frequently Asked Questions Referencing NEWTON About NEWTON About Ask A Scientist Education At Argonne Bird Feet Biology
Name: Jeanne
Location: N/A
Country: N/A
Date: N/A


Question:
Why don't birds feet freeze during the cold winter months?



Replies:
I'm not sure about all birds, but ducks have what is known as a counter current heat exchange mechanism in their legs and feet. Warmth flows from more warmth to less warmth naturally. As blood flows down the legs from the body it meets with colder blood coming back up and the warmth flows into the colder part of the foot.

K. Van Hoeck



Click here to return to the Biology Archives

NEWTON is an electronic community for Science, Math, and Computer Science K-12 Educators, sponsored and operated by Argonne National Laboratory's Educational Programs, Andrew Skipor, Ph.D., Head of Educational Programs.

For assistance with NEWTON contact a System Operator (help@newton.dep.anl.gov), or at Argonne's Educational Programs

NEWTON AND ASK A SCIENTIST
Educational Programs
Building 360
9700 S. Cass Ave.
Argonne, Illinois
60439-4845, USA
Update: June 2012
Weclome To Newton

Argonne National Laboratory