Spots much darker

[Lynxfire]

I had previously posted concerns about blue spots on a duck and a couple of you said they were just sun spots. I wanted to show how dark these spots have become to be sure it isn't something to worry about. My husband was concerned it is mildew but they don't wash off.

 

[FoodFreedomNow]

It looks like melanin skin pigment - Metzer Farms explains it here: http://www.metzerfarms.com/FAQ.cfm?CustID=23644327&Q=BeakSpots and this link is included by @raquel mills in this thread:
https://www.backyardchickens.com/threads/duck-with-black-spots-on-bill.29892/page-2.

It shouldn't be indicative of a health problem.

 

[Jpat]

This goofy smile is why i love pekins