Figure 5
From: Beak and skull shapes of human commensal and non-commensal house sparrows Passer domesticus

Average shape of the non-commensal P. d. bactrianus versus the commensal subspecies. Sizes are normalized.
From: Beak and skull shapes of human commensal and non-commensal house sparrows Passer domesticus
Average shape of the non-commensal P. d. bactrianus versus the commensal subspecies. Sizes are normalized.