stork mark
n.— «Emma was born on 13 February this year—Friday the 13th. She had a couple of stork marks—also known as salmon patches—on the back of her scalp. These are common and, though they don’t usually fade, are soon covered by growing hair.» —“Marked at birth: Should we intervene?” by Mark Piggott in United Kingdom Greatreporter.com Sept. 24, 2006. (source: Double-Tongued Dictionary)