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Genus Spizella
American Tree Sparrow - The American Tree Sparrow, Spizella arborea, is a medium-sized sparrow.
Black-chinned sparrow - This passerine bird is generally found in chaparral, sagebrush, arid scrublands, and brushy hillsides, breeding in the Southwestern United States , and migrating in winter to north-central Mexico and Baja California Sur. There is also a non-migratory population in central Mexico.
Brewer's chipping sparrow - Adults have grey-brown backs and brown crowns, both with dark streaks, and a pale eye-ring. Their wings are brown with light wing bars and the underparts are pale grey. Their bill is pale with a dark tip and they have a long notched tail. They are similar in appearance to the Clay-colored Sparrow but do not have a pale stripe on the crown or grey neck patch.
Clay-coloured Sparrow - Adults have light brown upperparts and pale underparts, with darker streaks on the back. They have a pale crown stripe on a dark brown crown, a white line over the eyes, a dark line through the eyes, a light brown cheek patch and brown wings with wing bars. The short bill is pale with a dark tip and the back of the neck is grey; they have a long tail. Non-breeding adults and immature resemble Chipping Sparrows and Brewer's Sparrows; they often form flocks with these birds outside of the nesting season.
Chipping Sparrow - The Chipping Sparrow is a species of American sparrow in the family Emberizidae. It is widespread, fairly tame, and common across most of its North American range.
Field Sparrow - Adults have brown upperparts, a light brown breast, a white belly, wing bars and a forked tail. They have a grey face, a rusty crown, a white eye ring and a pink bill.
Worthen's sparrow - Spizella wortheni can range in heights from 12.5–14 cm. It is identifiable by its distinctive head pattern. It has a grey head with a rufous crown, a brown postocular stripe and a pink bill. It has grey-brown upperparts, with dark brown streaks. It has a grey bottom, and dark brown wings and tail. Its wings are "edged paler, with broad whitish to pale buff wing-bar, buffy-rufous tertial and secondary edging, and greyish lesser coverts."³