
Photo: (c) 林孫鋒(Lin Sun Fong), some rights reserved (CC BY-SA) · CC BY-SA 4.0
Coturnix japonica
Diet
Grass seeds, millet, insects, worms, larvae, and other small invertebrates
Habitat
Grassy fields, riverbanks, and rice fields
Range
Russia and eastern Asia, including China, Korea, and Japan, with wintering populations extending into Southeast Asia and Africa
Clutch size
7–14 eggs; commonly 5–8 in Japan and 5–9 in Russia
Incubation period
Usually 19–20 days
Size
Wing length 92–101 mm
Wingspan
Not reported
Weight
About 90–115 g
Japanese quail inhabit parts of Russia and eastern Asia, including China, Korea, and Japan, and also occur in India. Wintering birds extend into China, Southeast Asia, northwestern Africa, the Nile Valley, and a broad region north of the Congo. They are associated with grassy fields, riverbanks, and rice fields, where ground cover provides feeding and nesting opportunities. Males and females have similar wing dimensions of approximately 92 to 101 millimeters, while reported average body masses are about 90 to 115 grams. (Animal Diversity Web)
The diet includes many grass seeds, particularly panic grasses and white millet, together with worms, insect larvae, and other small invertebrates. Insects become especially important during summer, and egg-laying females also swallow grit. Courtship includes vocal displays and courtship feeding, with the male producing a characteristic three-note call. Females lay roughly one egg per day. Clutches may contain seven to fourteen eggs, although five to nine are typical in parts of the native range, and incubation usually lasts 19 to 20 days. (Animal Diversity Web)