Date: 9/10/26 8:12 am From: Kevin Lucas via Tweeters <tweeters...> Subject: [Tweeters] Unusual bill color - White-crowned Sparrow
One of the adult plumage White-crowned Sparrows in our front yard this morning has a dark upper bill. The base of the bill is normal yellow-orange. The lower bill is normal yellow-orange, with a dark patch in the middle. I've never seen this before.
