Gambel's Quails live in the hot deserts in the South-West of the USA.
Both sexes have a comma-shaped topknot of feathers on top of their small heads which is fuller in males than in females.
Males have a bright rufous crest, chestnut flanks striped with white, and a creamy belly with a black patch.
Females are fairly plain grey on the head and neck, and lack the male's black belly patch and strong head pattern.

1st & 2nd photo: a female
3rd photo: a male.

Desert Botanical Garden, Phoenix, Arizona, USA, 23 April 2008