The scaled quail (Callipepla squamata), also commonly called blue quail or cottontop, is a species of the New World quail family. It is a bluish gray bird found in the arid regions of the Southwestern United States to Central Mexico. This species is an early offshoot of the genus Callipepla, diverging in the Pliocene. The nest is typically a grass-lined hollow containing 9–16 speckled eggs. When disturbed, it prefers to run rather than fly. Widespread and common throughout its range, the scaled quail is evaluated as Least Concern on the IUCN Red List of Threatened Species.
Distribution and taxonomy Scaled quail occur from south-central Arizona, northern New Mexico, east-central Colorado, and southwestern Kansas south through western Oklahoma and western and central Texas into Mexico to northeastern Jalisco, Guanajuato, Queretaro, Hidalgo, and western Tamaulipas. It has been introduced to Cuba, Jamaica, Haiti, Dominican Republic, Puerto Rico and to the United States in Hawaii, central Washington, eastern Nevada, and Nebraska, but is only considered established in central Washington and eastern Nevada. Scaled quail has formed several subspecies, 3 of which range into the USA:
Callipepla squamata squamata Vigors, 1830 (Altiplano scaled quail). The nominate subspecies; it is only found on the Central Plateau (altiplano) of Mexico. Callipepla squamata pallida Brewster, 1881 (northern scaled quail). The most common subspecies, it occurs from Arizona and New Mexico to Colorado and just into Oklahoma, and western Texas, northern Chihuahua, and Sonora. It is paler than the nominate subspecies. Callipepla squamata hargravei Rea, 1973 (Upper Sonoran scaled quail). A form of arid habitat, it is only found in the area where the states of Colorado, Kansas and Oklahoma meet, and in northwestern New Mexico. It is the palest subspecies, adapted to dry and sandy habitat. Callipepla squamata castanogastris Brewster, 1883 (chestnut-bellied scaled quail). Found in southern Texas from Eagle Pass and San Antonio south to adjacent northwestern Mexico (Coahuila, Nuevo León, and Tamaulipas). Similar individuals are sometimes found in the extreme northeast and west of the species' range. The chestnut brown belly distinguishes it from all other subspecies; it is also darker than the other two found in the USA.
Description This bird is named for the scaly appearance of its breast and back feathers. Along with its scaly markings, the bird is easily identified by its white crest that resembles a tuft of cotton. It typically measures 25.4–30.5 cm (10.0–12.0 in) in length, 38 cm (15 in) in wingspan, and weighs 177–191 g (6.2–6.7 oz).
Plant communities According to Ligon, the distribution of scaled quail is largely coextensive with mesquite (Prosopis spp.), condalia (Condalia spp.), and cholla (Cylindropuntia spp.). In Oklahoma, scaled quail occur in sand sagebrush (Artemisia filifolia)-grassland, pinyon-juniper (Pinus spp.-Juniperus spp.), and shortgrass High Plains. Sand sagebrush-grasslands include sand sagebrush, soapweed yucca (Yucca glauca), skunkbush sumac (Rhus trilobata), and sand plum (Prunus watsonii). Scaled Quail in Oklahoma inhabit rough or rolling land, especially where sagebrush (Artemisia spp.), mesquite, cactus (Opuntia spp. and others), yucca (Yucca spp.), juniper, sand shinnery oak (Quercus havardii), and rocks furnish cover. In Colorado, scaled quail occupy sand sagebrush and/or yucca stands on sandy soils. The cover types used by scaled quail in Colorado are, in descending order, sand sagebrush-grassland, pinyon-juniper, dense cholla-grassland, dryland farmland, irrigated farmland, and greasewood (Sarcobatus spp.)-saltbush (Atriplex spp.) washes. Scaled Quail made little or no use of sparse cholla-grassland, riparian areas, reseeded grasslands, or shortgrass prairie disclimax.
Timing of major life events In Arizona, pairing and maximum dispersal is complete by mid-June. Nesting probably does not begin until early July. In Oklahoma, egg laying usually starts in late April. Completed clutches have been found as early as May 8. Egg laying occurs from March to June in Texas and Mexico, and from April to September in New Mexico. Nests with eggs were reported as early as April 15 in New Mexico. Scaled quail lay from 9 to 16 eggs; most clutches are 12 to 14 eggs. These eggs measure 3.09–3.26 cm (1.22–1.28 in) in length and 2.43–2.51 cm (0.96–0.99 in) in width. Eggs are incubated by the female for 21 to 23 days. Double-brooding (the production of two consecutive broods in one season) is common. In west Texas, Wallmo observed the male rearing the first brood while the female began a second clutch. Sutton stated, however, that scaled quail in Oklahoma are probably single-brooded, but have hatched broods as late as September 6. Ehrlich and others also list scaled quail as single-brooded. The precocial young leave the nest shortly after hatching. They are accompanied by at least one, usually both, parents, who show them how to find food. The young fledge rapidly (age at fledging not reported in the literature), and are adult size in 11 to 15 weeks. Scaled quail are fairly sedentary. The winter home ranges of scaled quail coveys varied from 24 to 84 acres (9.7 to 34.0 ha). The home ranges of separate coveys overlap only slightly or not at all. From September to November scaled quail coveys maintain stable territories. In Arizona, 75 to 90% of a population apparently moved off of a breeding area by mid-November, moving to nearby mountain foothills. The mountain habitat was consistent with that found on the breeding area. In March the population on the breeding area increased again, with most birds in groups of four to eight. The average winter covey size for scaled quail is around 30 birds, although coveys of up to 150 birds have been reported.
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