Cante del verdecillo

European greenfinchbirds

It emits short calls (triiulit-lit-lit) while flying, which allow to distinguish it without the need to recognize its coloration. The song of males in heat is a very rapid and prolonged strident chirp, composed of several stanzas. They then sing both perched and in flight, gliding and flapping very slowly – compared to the usual flapping – in a manner reminiscent of the gliding flight of large bats.
It is found in practically all the territory, including the Balearic and Canary archipelagos. It only becomes rare in the highlands and in totally deforested areas during the breeding season.
Its diet consists mainly of seeds of ephemeral or biennial grasses (Erysimum, Senecio, Cerastium, Myosotis, Prunella vulgaris, Silene). In addition, they secondarily ingest insects and peck at the pulp of fleshy fruits.

Wikipedia

It emits short calls (triiulit-lit-lit-lit) while flying, which allow it to be distinguished without the need to recognize its coloration. The song of males in heat is a very rapid and prolonged strident chirp, composed of several stanzas. They then sing both perched and in flight, gliding and flapping very slowly – compared to the usual flapping – in a manner reminiscent of the gliding flight of large bats.
It is found in practically all the territory, including the Balearic and Canary archipelagos. It only becomes rare in the highlands and in totally deforested areas during the breeding season.
Its diet consists mainly of seeds of ephemeral or biennial grasses (Erysimum, Senecio, Cerastium, Myosotis, Prunella vulgaris, Silene). In addition, they secondarily ingest insects and peck at the pulp of fleshy fruits.

Greenfinch

It should be an uninterrupted and variable turn, varying in pitch up and down as the vowel changes. The «S» is dominant of the turn, giving together with the «CH» that appears in the background, as a whistling sound.
Continuous turn of straight movement that they emit with force. The qualities to take into account are the sound line (the tonality does not have to vary from beginning to end); the length of the turn and the force with which the turn is emitted.
These are the classic onomatopoeias emitted by the bird when it is immature or follows the parents, demanding food. Phonetically, the greenfinch can express it with a discontinuous or beaten sound line; and the simple in a continuous form. The dominant consonant is the «CH,» conjunct with the vowel «i».
The turns must follow a slow-regular and well-marked rhythm. We will call rhythm or lack to the greater or lesser speed with different voices are chained. The best quality are those emitted with the T and P.
The linking of three onomatopoeias of different chapters composed by the phonetic expressions belonging to the basic and complementary sung ones, will be what is necessary to register in this chapter, as long as they are clean of negative notes.

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The serin (Serinus serinus)[2] is a species of passerine bird of the family Fringillidae native to Europe, North Africa and western Asia. It is not endangered and its European population is estimated to be between 17,000,000 and 40,000,000 individuals.[1] It was described by Linnaeus gypsypsies in the early 19th century.
It was described by Linnaeus gipsy in 1766 under the name Fringilla serinus.[5] It is a monotypic species, i.e., with no described subspecies,[6][7] although some sources mention a subspecies Serinus serinus flaviserinus.[5] Its diet is basically granivorous.
Its diet is basically granivorous, feeding on all kinds of seeds and fruits of annual plants, trees and shrubs, etc.; however, it occasionally also captures invertebrates, especially during chick fattening.