Passeriforms Birds. Vertebrates animal Kingdom. Wildlife. Fauna. Zoology.

This order is the most numerous, with about 5,000 species with many different characters.
They are generally small in size, with a slender body, small head and beak of varied shapes, adapted to the type of feeding.
Legs adapted for grip and permanence in the branches by a tendon mechanism.
The mechanism of the legs of the birds is that when perching on the branches, a tendon closes the leg preventing the bird from falling. To open it you have to rise slightly.
Soft plumage, abundant and of different colors.
They are agile, vivacious and resistant.
They have syringes that allow them to modulate songs and trills, some very harmonious.
They feed on seeds, grains, fruits and insects.
They lay eggs in nests built in trees or on the ground.

They are birds of small and medium size and in general with little flashy colorations, which compensate with their songs.
They build concave nests, generally in the branches, and sometimes in holes or in the ground and are territorial.
They are insectivorous or polyphagous.

This family of Neotropical origin has a single representative species, the chochin. They are small birds, active, brown plumage, not very striking, but very powerful voice.
The males build several globular nests, with a lateral entrance.

They are the only aquatic passerines. They look like big chochines, with their plump body and short tail that they lift vertically and also because of the large globular nests they build.
They live in the vicinity of running waters, where they swim and dive with agility.  Their tremendously developed fat gland allows them to keep the plumage perfectly greased and, therefore, they do not get wet in their dives.

Terrestrial birds, with colorful dullness and fake appearance.
Its fine, insectivorous beak, contrasts with its winter feeding, very granivorous.  Your digestive tract is perfectly adapted to this diet,  with a very muscular buckle and pinwheel that generally contains pebbles that facilitate the crushing of the seeds.

Land birds that inhabit deforested land or river beaches. As land birds they have the very long toe nail and run quickly.
Two groups can be made, the bisbitas, of brown colors and relatively short tail and the washers, of brighter color and long tail that shake very frequently.
They are insectivorous, although in winter they consume abundant seeds.

The shrike family is a clear example of convergent evolution.  Predators of large insects and small vertebrates, their beak is strong and hooked, with a cleft in the upper jaw, like that of hawks.
They watch their prey from innkeepers, hunting more than they can consume; the leftover hunt is stuck in thorns, serving as a food reserve.
Its size is small or medium and its color combines white, black and brownish, being unimpressive. In general the same sexes.

Very active little birds, sometimes beautifully colored, looking for their food in the tree branches, adopting acrobatic postures, often hanging upside down.
 They nest in tree holes, walls, etc.
 Its beak is short and robust and its legs have very strong short tarses.

The two starling species that can be seen in Aragon are medium-sized and black birds, with a strong straight beak and a short square tail.
 They are polyphagous and both species coexist with man, being sometimes so abundant that they become a plague.

Birds of medium or large size (among them are the largest passerines), with a robust beak.
 Two groups can be made, one, the one of the crows, of black color, long wings and short tail and another, the jays and related ones, with more colorful color, short rounded wings and relatively long tail.
 They are birds of high psychism, with great adaptive power, many have increased their populations thanks to the exploitation of crops.
 Its feeding is very varied (polífagos).