Please confirm that you are a health care professional
The link you have selected will take you to a third-party website. We do not control or have responsibility for the content of any third-party site.
This site complies with the HONcode standard for trustworthy health information: verify here.
The duck at the bottom of the image is in ventral recumbency on the floor with eyes closed and neck outstretched.
Courtesy of Dr. H. John Barnes.