Today is flashy Western Tanager, this is the male - I first saw one unexpectedly, at Jenny Lake in the Grand Teton National Park, and was really excited. They are occasionally also seen near here, at Lake Texoma, but I've only thought I saw one once.
Here, from your friendly neighborhood birders at Cornell, are the Cool Facts:
The Western Tanager breeds farther north than any other member of its mostly tropical family, breeding to nearly 60° N in the Northwest Territories.
The red pigment in the face of the Western Tanager is rhodoxanthin, a pigment rare in birds. It is not manufactured by the bird, as are the pigments used by the other red tanagers. Instead, it must be acquired from the diet, presumably from insects that themselves acquire the pigment from plants. at http://www.birds.cornell.edu/AllAboutBirds/BirdGuide/Western_Tanager_dtl.html#coolfacts
All those holly berries go to a good cause.