20-12-2024 EL RETIRO PARK MADRID, ESPANA - EURASIAN BLUE TIT (Cyanistes caeruleus)

The Eurasian blue tit (Cyanistes caeruleus) is a diminutive and vibrant passerine, a member of the tit family, Paridae. It is distinguished by its striking blue and yellow plumage and compact stature.

This species exhibits an azure-blue crown with a dark blue line passing through the eye and encircling the white cheeks to the chin. The forehead and a wing bar are white, while the nape, wings, and tail are blue. The back is yellowish-green, and the underparts are predominantly sulphur-yellow with a dark abdominal line. Both sexes are similar, but males may exhibit a brighter blue crown under ultraviolet light.

Eurasian blue tits are found in temperate and subarctic Europe and the western Palearctic, favoring deciduous or mixed woodlands rich in oak. They are adaptable and can thrive in tree holes or nest boxes in various environments, including urban areas.

The species is widespread and commonly breeds across Europe, extending into parts of the Middle East. It is a resident bird, with populations found from Ireland and the United Kingdom to Iran and northern Turkey.

Eurasian blue tits are known for their agility and acrobatic feeding habits, often hanging upside down on the outermost branches. They form mixed winter flocks with other tit species and are adept at ascending tree trunks in short hops.

29-3-2023 SIERRA DE ANDUJAR, ANDALUCIA - EURASIAN BLUE TIT (Cyanistes caeruleus)

https://www.inaturalist.org/taxa/144849-Cyanistes-caeruleus

17-10-2021 KAVALA, GREECE - EURASIAN BLUE TIT (Cyanistes caeruleus)

 

13-8-2021 PARQUE DE JESUITAS, SALAMANCA - EURASIAN BLUE TIT (Cyanistes caeruleus)

The Eurasian blue tit (Cyanistes caeruleus) is a small passerine bird easily recognizable by its blue and yellow plumage. The bird is famed for its acrobatic skills, as it can cling to the outermost branches and hang upside down when looking for food.

A typical Eurasian blue tit has an azure-blue crown and dark blue line passing through the eye, and encircling the white cheeks to the chin, giving the bird a very distinctive appearance. The forehead and a bar on the wing are white. The nape, wings, and tail are blue and the back is yellowish-green. The underparts are mostly sulphur-yellow with a dark line down the abdomen. The bill is black, the legs bluish grey, and the irides dark brown. The sexes are similar, but under ultraviolet light, males have a brighter blue crown. Young blue tits are noticeably more yellow.

Eurasian blue tits are widespread and common resident breeders throughout temperate and subarctic Europe and in parts of the Middle East. They inhabit deciduous or mixed woodlands with a high proportion of oak, shrubland with scattered trees, and hedgerows. These small birds are also common in parks, gardens, and even in the center of towns.

Eurasian blue tits are usually resident and non-migratory birds. They are social and often form mixed winter flocks with Great tits. These small birds are active during the day spending most of their time searching for food in trees, bushes, and sometimes on the ground. Blue tits are very active and agile when foraging; they will often ascend a trunk in short jerky hops, imitating a treecreeper, and can hang from almost anywhere. As a rule, they roost in ivy or evergreens, but in harsh winters will roost wherever there is a suitable small hole, be it in a tree or nesting box. 

Eurasian blue tits sing and call throughout the year. Songs are mostly used in late winter and spring to defend the territory or to attract mates. Calls are used for multiple reasons. The birds inform one another of their location in trees by means of contact-calls.

They use alarm-calls to warn others (including birds of other species) about the presence of predators in the neighborhood. Scolding, for example, is used when a ground predator (e.g. fox, cat, or dog), a low-flying predator, or a perched owl is noticed. Sometimes this is followed by mobbing behavior in which birds gather together in flocks to counter a predator. The alarm whistle warns other birds about the proximity of a Eurasian sparrowhawk, a northern goshawk, a common buzzard, or other flying predators that form a potential danger in the air.

Eurasian blue tits are polygynous meaning that males mate with more than one female. The breeding season takes place between April and late June. Courtship includes flights performed by the male and both partners then give a series of high-pitched 'zeedling' notes. Eurasian blue tits nest in any suitable hole in a tree, wall, or stump, or an artificial nest box, often competing with house sparrows or great tits for the site. The nest itself is a cup made with dried grasses, moss, leaves, wool, hair, and feathers. The female usually produces 2 broods per year laying 7-14 eggs in each clutch. Incubation lasts about 12 to 16 days and is performed by the female. The male feeds the female during this time. The chicks hatch altricial (helpless) and are fed by both parents. They usually spend 3 weeks in the nest before fledging.           

20-9-2018 ALARCOS, LA MANCHA - EURASIAN BLUE TIT (Cyanistes caeruleus)

The Eurasian blue tit (Cyanistes caeruleus) is a diminutive and vibrant passerine, a member of the tit family, Paridae. It is distinguished by its striking blue and yellow plumage and compact stature.

This species exhibits an azure-blue crown with a dark blue line passing through the eye and encircling the white cheeks to the chin. The forehead and a wing bar are white, while the nape, wings, and tail are blue. The back is yellowish-green, and the underparts are predominantly sulphur-yellow with a dark abdominal line. Both sexes are similar, but males may exhibit a brighter blue crown under ultraviolet light.

Eurasian blue tits are found in temperate and subarctic Europe and the western Palearctic, favoring deciduous or mixed woodlands rich in oak. They are adaptable and can thrive in tree holes or nest boxes in various environments, including urban areas.

The species is widespread and commonly breeds across Europe, extending into parts of the Middle East. It is a resident bird, with populations found from Ireland and the United Kingdom to Iran and northern Turkey.

Eurasian blue tits are known for their agility and acrobatic feeding habits, often hanging upside down on the outermost branches. They form mixed winter flocks with other tit species and are adept at ascending tree trunks in short hops.

Their vocal repertoire includes songs and calls used for territory defense, mate attraction, and communication. Alarm calls may be used to warn of predators, and a series of high-pitched notes are associated with courtship and copulation.

Nesting occurs in suitable cavities, with a preference for holes in trees or artificial nest boxes. The species is socially monogamous but may engage in extra-pair copulations. Clutch size can be large, with eggs laid in April or May.

Primarily insectivorous, the Eurasian blue tit's diet consists of insects and spiders, with seeds and other plant-based foods consumed outside the breeding season. Caterpillars are particularly important for feeding nestlings.

The Eurasian blue tit is classified as Least Concern by the IUCN, indicating a stable population across its range. It is also considered a Green Status species by the Royal Society for the Protection of Birds in the UK.

20-3-2018 RETIRO PARQUE, MADRID - EURASIAN BLUE TIT (Cyanistes caeruleus)

The Eurasian blue tit (Cyanistes caeruleus) is a diminutive and vibrant passerine, a member of the tit family, Paridae. It is distinguished by its striking blue and yellow plumage and compact stature.

This species exhibits an azure-blue crown with a dark blue line passing through the eye and encircling the white cheeks to the chin. The forehead and a wing bar are white, while the nape, wings, and tail are blue. The back is yellowish-green, and the underparts are predominantly sulphur-yellow with a dark abdominal line. Both sexes are similar, but males may exhibit a brighter blue crown under ultraviolet light.

Eurasian blue tits are found in temperate and subarctic Europe and the western Palearctic, favoring deciduous or mixed woodlands rich in oak. They are adaptable and can thrive in tree holes or nest boxes in various environments, including urban areas.

The species is widespread and commonly breeds across Europe, extending into parts of the Middle East. It is a resident bird, with populations found from Ireland and the United Kingdom to Iran and northern Turkey.

Eurasian blue tits are known for their agility and acrobatic feeding habits, often hanging upside down on the outermost branches. They form mixed winter flocks with other tit species and are adept at ascending tree trunks in short hops.

Their vocal repertoire includes songs and calls used for territory defense, mate attraction, and communication. Alarm calls may be used to warn of predators, and a series of high-pitched notes are associated with courtship and copulation.

Nesting occurs in suitable cavities, with a preference for holes in trees or artificial nest boxes. The species is socially monogamous but may engage in extra-pair copulations. Clutch size can be large, with eggs laid in April or May.

Primarily insectivorous, the Eurasian blue tit's diet consists of insects and spiders, with seeds and other plant-based foods consumed outside the breeding season. Caterpillars are particularly important for feeding nestlings.

11-8-2017 MILTENBERG, GERMANY - EURASIAN BLUE TIT (Cyanistes caeruleus)

The Eurasian blue tit (Cyanistes caeruleus) is a diminutive and vibrant passerine, a member of the tit family, Paridae. It is distinguished by its striking blue and yellow plumage and compact stature.

This species exhibits an azure-blue crown with a dark blue line passing through the eye and encircling the white cheeks to the chin. The forehead and a wing bar are white, while the nape, wings, and tail are blue. The back is yellowish-green, and the underparts are predominantly sulphur-yellow with a dark abdominal line. Both sexes are similar, but males may exhibit a brighter blue crown under ultraviolet light.

Eurasian blue tits are found in temperate and subarctic Europe and the western Palearctic, favoring deciduous or mixed woodlands rich in oak. They are adaptable and can thrive in tree holes or nest boxes in various environments, including urban areas.

The species is widespread and commonly breeds across Europe, extending into parts of the Middle East. It is a resident bird, with populations found from Ireland and the United Kingdom to Iran and northern Turkey.

Eurasian blue tits are known for their agility and acrobatic feeding habits, often hanging upside down on the outermost branches. They form mixed winter flocks with other tit species and are adept at ascending tree trunks in short hops.