Dark-Eyed Junco

The dark-eyed junco is a surprisingly varied bird with 14 or 15 subspecies. At one time they were considered separate species, but they interbreed extensively in areas where they contact each other. There is an Oregon or brown-backed group which includes ssp. Thurber's dark-eyed junco found in the interior of California from San Bernardino to Modoc County. That is the ssp. I am most familiar with. 

Seen near the Chilao Visitor Center in the San Gabriel Mountains above Los Angeles. 

Seen at Lake Silverwood near the Cajon Pass in the San Bernardino Mountains. 

In our backyard in Redlands, California. 

In Oak Glen, San Bernardino Mountains. 

It also includes the Nevada dark-eyed junco, ssp. mutabilis, found in the Great Basin. I saw those below at Fish Springs NWR near Delta, Utah.

 Ssp. pinosus is found in coastal California from Santa Barbara to Del Norte County. 

Found at the UC Santa Cruz Arboretum in Santa Cruz, California.

Found in Portola Redwood State Park in northern California.

I'm not sure what ssp. these are, found in Caprock Canyon State Park in the Texas Panhandle.

This slate-colored dark-eyed junco was seen in Shawnee Mission Park in Kansas.

Illustration of a slate-colored ssp. hyemalis male from Birds of the World. Females are less colorful. 

Illustration of a brown-backed ssp. oreganus male from Birds of the World. Females are less colorful.

Range from Birds of the World.