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 Barred Owls in Winter and Eggs
Name: Sally A.
Status: N/A
Age: 40s
Location: N/A
Country: N/A
Date: 2001281

How do barred owls spend their winters? Also how do they breathe, eat and excrete wastes as they (barred owls) develop in their egg?

Barred owls are permanent residents in most of their range, and are active all winter. Following is an excerpt from an extended article on eggs in The Birder's Handbook, See also any basic ornithology text.

"Some of the details of bird embryology are well known, thanks to intensive research on the domestic chicken. Indeed, generations of biology students have studied the embryology of the chick. The zygote begins development on the surface of the yolk, which is the main energy source for the chick embryo. The "white" (albumen) of the egg provides a sterile, protective, cushioned surrounding for the yolk and the developing embryo. A series of membranes carries out functions for the developing embryo; one (the amnion) cushions it so that no matter how an egg is turned, the embryo always remains "up.""

Copyright 1988 by Paul R. Ehrlich, David S. Dobkin, and Darryl Wheye.

J. Elliott

Believe me, after spending two years chasing a Barred Owl using radio-telemetry in the worst of winters and at night, I can safely say that these birds are active all winter. They are effective hunters.

Steve Sample

Click here to return to the Zoology 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 (, or at Argonne's Educational Programs

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

Argonne National Laboratory