Obična jarebica
- Gray partridge chicks, still wet from hatching, are able to follow their parents for up to 200 meters. They reach the size of an adult only by one and a half months.
- At around 7 days old, gray partridge chicks are already able to flutter short distances, and by 14 days they can cover considerable distances in the air.
Старост
The gray partridge’s typical lifespan is from 2 years to 5 years, although the maximum recorded lifespan is 5 years and 2 months, with a theoretical lifespan ranging from 3 years and 10 months to 4 years and 11 months. The species reaches sexual maturity at an age between 9 months and 1 week and 1 year and 3 months. Eyes open immediately after birth. An embryo develops inside an egg, and the chick, covered in thick down, grows rapidly under parental care during the chick stage, which lasts from 1 day to 2 weeks. The adult stage, when the bird is capable of reproduction, lasts from 1 year to 5 years and 6 months.
Фенотип
The young grey partridge has soft yellow-brown down for warmth and thin legs for walking immediately after hatching. The adult grey partridges possess a short, strong beak for gathering seeds and insects from the ground, and have powerful legs without spurs that allow for rapid running from danger. The species exhibits grey plumage with brown and reddish spots for camouflage on the ground, and has short, rounded wings for quick flights over short distances. A distinctive feature of the adult is a dark-brown horseshoe-shaped patch on the underside of the body. The male and female both have strong legs, and the young have thin legs.
Физиологија
Gray partridges measure from 12 centimeters to 3.6 meters in height, and their body length ranges from 28 to 32 centimeters; the species’ mass varies from 217 to 402 grams, with a wingspan of 46 centimeters. The embryo stage exhibits a body mass of 12 to 18 grams and a body length of 3 to 4 centimeters, while the chick stage shows a body mass from 15 to 80 grams and a body length from 5 to 15 centimeters. Adult gray partridges have a body mass between 380 grams and 0.5 kilograms, and a body length of 28 to 32 centimeters.
Станиште
Gray partridges inhabit terrestrial landscapes including ground forests and elevations up to 600 meters above sea level; the species occupies temperate mixed forests with warm summers and many oak, birch, and maple trees, flooded meadows where water frequently covers the land and there is abundant grass, and taiga characterized by cold winters and numerous coniferous trees such as spruce and pine. The climate always features considerable moisture with frequent rains and high humidity, and includes cool summers with abundant rain and snow in winter, winters with substantial snow and cold temperatures, warm summers and plentiful rain, and warm summers coupled with mild winters.
Склониште
Gray partridges inhabit areas of tall grass, crop fields, or meadows. The species builds or uses a nest structure for laying eggs and raising young. The nest is constructed from grass and stems.
Географија
Gray partridges are found in the Nearctic and Palearctic biogeographical regions, inhabiting Celtic broadleaf forests, broadleaf forests of Western Europe, Baltic mixed forests, European Atlantic mixed forests, and Sarmatian mixed forests.
Храна
The grey partridge feeds on seeds of plants, green shoots and insects, with chicks especially needing invertebrates for growth; the species gathers food with its beak from the surface of the ground, including grass seeds, grains, insects, green leaves, weeds, plants, leaves, grain and grass seeds. Beetles, butterflies, diptera, hymenoptera, bedbugs, orthoptera, dragonfly, mayfly, net-winged insects, amphipods, ribbon worms and sucking lice serve as food for the chicks. The daily food requirement for the species is from 30 g to 60 g. The feeding strategy involves searching for and obtaining food, however an eagle can catch the grey partridge.
Размножавање
The gray partridge reproduces with a reproductive interval of one year; in spring, the birds form pairs and the female constructs a nest on the ground, laying eggs. The female incubates the clutch, and both parents lead the young. Embryonic development lasts 3 weeks and 3 days. A clutch has 10 to 18 eggs, which constitutes the brood size. The young reach maturity from 10 months to 1 year and 1 month. The female produces 10 to 18 offspring.