Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Photograph (dorsal view) of a non-commensal house sparrow P. d bactrianus (upper panel) and a similar sized commensal house sparrow P. d. persicus (lower panel). Notice the difference in robustness and elongation of the facial cranium, and in particular a) the postorbital process, b) the lachrymal process, c) the oral surface of the maxillare as seen through the nostrils, d) the nasal process and e) the occipital region.
