Jay
- The maximum lifespan of the eurasian jay is 22 years. This is a record among birds living in Europe.
- The Eurasian jay can mimic the calls of various animals and human speech, especially when kept in captivity.
Age
The Eurasian jay’s typical lifespan ranges from 10 years and 2 months to 16 years and 11 months, with a maximum recorded lifespan of 13 years and 6 months, and a theoretical lifespan between 12 years and 8 months and 18 years and 1 month. The species reaches sexual maturity from 2 months and 2 weeks to 2 years of age; an embryo develops inside the egg for approximately two and a half weeks. The nestling stage involves the young being fed insects and other food by its parents, lasting from 2 weeks and 4 days to 1 month and 1 week. Following this, the post-fledging rapid growth stage sees the young bird learning to fly and forage independently for between 1 month and 1 week and 1 year. The adult stage lasts from 1 to 20 years, during which time the bird may seek a mate and raise young.
Phenotype
The young Bohemian waxwing has a short, soft yellow bill and grey, fluffy plumage without bright blue markings. After a period of rapid growth, the young species develops blue spots on its wings and black stripes on its head. An adult Eurasian jay possesses a strong black bill suited for cracking nuts and catching insects. The adult’s body is pinkish-brown, with a white head featuring black stripes, and bright blue spots with black and white stripes on its wings; the tail is black. Wide wings enable the species to fly quickly between trees.
Physiology
The Eurasian Jay is a bird species characterized by a body length of from 32 to 35 cm and a weight of from 49.1 to 60 g, as well as a wingspan of 54 cm. The "Embryo" stage is represented by individuals with a body weight of from 4 to 7 g and a body length of from 0 mm to 3 cm, followed by the "Nestling" stage with a body weight of from 10 to 80 g and a body length of from 5 to 15 cm. After rapid growth, young individuals reach a body weight of from 120 to 160 g and a body length of from 25 to 32 cm, while adult individuals have a body weight of from 140 to 190 g and a body length of from 32 to 35 cm.
Habitat
The Eurasian jay occupies a terrestrial landscape, specifically ground forests, and is found at elevations up to 2 kilometers. This species inhabits temperate mixed forests characterized by warm summers and an abundance of oak, birch, and maple trees, as well as flooded meadows with abundant grasses where water frequently inundates the land. Furthermore, the European jay’s habitat includes taiga environments with cold winters and numerous coniferous trees such as spruce and pine. The climate varies, with some areas experiencing constant moisture and frequent rainfall, while others have cool summers and snowfall in winter; other regions feature warm summers and plentiful rainfall, or simply warm summers and mild winters, with comfortable summers averaging between 20 and 25 degrees Celsius.
Shelter
The Eurasian jay shelters in a nest located in the fork of a tree branch at a height of from 2 to 10 meters. The nest is a structure built or used for laying eggs and raising young. Nesting materials include roots, grass, hair, and thin branches.
Geography
The Bohemian waxwing occupies the Palearctic biogeographical region and inhabits several ecosystems, including Celtic broadleaf forests, broadleaf forests of Western Europe, coniferous forests of the Qilian Mountains, Balkan mixed forests, Baltic mixed forests, and coniferous and mixed forests of the Pyrenees.
Feeding
The jay’s diet consists of a wide variety of food sources; during summer, the species catches insects, spiders, and worms, while in autumn and winter, it consumes acorns, nuts, seeds, and berries, and occasionally captures small lizards or nestlings of other birds. The species forages for food on the ground and in trees, using its beak to break open hard foods, and its diet includes acorns, nuts, seeds, insects, spiders, berries, coniferous cones, and plants. The jay makes large stores of acorns for winter. The daily food requirement is from 30 grams to 60 grams. Young jays consume invertebrates, including beetles, flies, Hymenoptera, butterflies, water bugs, ribbon worms, mollusks, polychaetes, bedbugs, Orthoptera, dragonflies, and stoneflies.
Reproduction
The Bohemian waxwing builds a nest on a tree with its mate in the spring. The female lays from five to seven eggs; both parents then take turns incubating the clutch and feeding the hatched chicks. Development of the embryo lasts two weeks, and the brood size is from five to seven young. The species reaches maturity from one to two years of age. The female produces offspring every one year.