Passerines: what they are, characteristics and examples

Passerine birds are an order of birds that comprise more than half of the world’s avian species. They are commonly known as birds or songbirds and are characterized by generally being small or medium-sized and by having a very complex vocal apparatus that allows them to make intricate songs, calls and vocalizations.

It is the most diverse taxonomic group of terrestrial vertebrate animals, and the second if aquatic vertebrates are also included. From this great diversity we can extract the relevance of passerine birds, which have colonized all the continents of the planet except Antarctica, and have adapted to almost all types of terrestrial ecosystems.

The term passerine comes from the same Latin word used to name the sparrow, passera term from which the word “bird” in Spanish comes. So the term passerine was originally defined to group all birds with a shape similar to that of a sparrow (from the Latin passersparrow; formshaped like).

Regarding their taxonomy, these birds make up the order Passerineswhich is located in the superorder Neognathaewhich includes almost all modern birds with the exception of non-flying wading birds (ostriches, emus, etc.). In turn, the order Passerines It encompasses three suborders, which are called Passeri, Tyranni and Acanthisitti.

• They are small or medium in size, generally between 5 and 60 cm in length.
• Generally, they have a conical and pointed beak, which may be adapted to eat seeds, fruits or insects.
• They are capable of emitting complex and varied sounds, which they use to communicate, attract mates or defend their territory.
• They present a great diversity of colors and shapes in their plumage, which is usually more showy in males than in females.
• They are characterized by having specific legs, with a long and strong rear toe that allows them to cling to branches and climb trees.
• Its skeleton presents a very marked adaptation to flight, such as, for example, the presence of a keel-shaped sternum or the pneumatization of the bones to reduce their weight.
• Despite their size, a large part of the passerine species are migratory, so they move latitudinally depending on the seasons in search of good weather and food. Here you can learn more about Migratory Birds: what they are, characteristics and examples.

As we have seen, passerine birds make up a group of animals that is truly diversified and widespread throughout our planet. To understand the importance of these birds in nature and their evolutionary relevance, we must look at one of their anatomical characteristics: their beak.

Among the characteristics of passerine birds, we have highlighted that their beak may be adapted to the type of food that the species consumes. This has led to the generation of a great diversity of beak types throughout the evolutionary process, which has allowed passerine species to cohabit with each other, specializing in consuming foods that other birds are not already taking advantage of. This strategy, as in other types of living beings, leads to the possibility for passerines to coexist without competing for food and other resources, which is known in biology as occupying different ecological niches, and is the key to why today we can enjoy these birds almost anywhere on Earth.

house sparrow

This is the species that gives its name to the entire order of passerines. The house sparrow (Passer domesticus) is probably the most widespread species of bird on the planet, thanks to its adaptability and low demand for food. The sparrow has a close relationship with the human species, of which it is a direct commensal, which is why sparrows can be seen in both rural and urban environments.

Although both sexes generally have a brown color on the back and gray on the belly, in the case of the male the brown tones become reddish, especially during spring, and a black bib is visible on the throat. While in the female, the tones are noticeably paler, they lack a black bib and have a characteristic whitish stripe in the eyebrow area.

chaffinch

The common finch (Fringilla coelebs) has a body structure very similar to that of a sparrow in terms of size and shape, but stands out for its bright colors and its characteristic song, which can be heard in forests and gardens throughout Europe and much of Asia. In the male’s plumage there is an orange color distributed over its chest and belly, bluish gray on the upper part of the head (pilus) and nape, and dark tones that appear black on the wings, interrupted by yellowish white bands. The female, as in the case of the sparrow, has more subdued colors, among which brown tones predominate.

As a curiosity, in the Canary Islands there are a series of finches that until very recently were considered subspecies of the chaffinch, but in 2021 a scientific study was published in which it was determined that these subspecies are actually a species in themselves, proposing a revision of the taxonomy of finches. In this same article, it is proposed Fringilla canariensis as the scientific name for the canary finch.

common nightingale

The common nightingale (Luscinia megarhynchos) is not known for its plumage, which has dull, brown colors that make it very unnoticed, but it is recognized as one of the most important songbirds on the European continent. With their powerful and unmistakable song, which they can reproduce even at night, male common nightingales can mark their territory from the tranquility of the thicket, without exposing themselves, and while enjoying the cool temperatures of the undergrowth and watercourses. As in other passerines, the song fulfills the dual function of marking the territory to prevent the intrusion of other males and attract potential reproductive partners.

As you already know passerine birds better, we encourage you to discover other species of this group such as, for example, the Benteveo and the Royal Swift.

If you want to read more articles similar to Passerines: what they are, characteristics and examples, we recommend that you enter our Biology category.