What's the name of this bird? (with pictures)

The toucan, also translated as the plum finch, is a general term for several tropical birds in the Old World. Generally speaking, it refers to birds of the order Estrillididae, and in a narrow sense, it refers to birds of the family Estrellidini, especially 28 species of the genus Estrilda, including several popular caged birds. Feed on seeds, move in groups and build nests in tall grass. Most species are brown or light gray with red, yellow or black; Most of them have fine transverse spots. The beak is conical and the color is like sealing wax, so it is also called waxbill bird. E. astrild is 10 cm (4 inches) long, with a brown top and a pink bottom. It is used in Africa (the birthplace of most species of this genus) and has been introduced to Brazil. The beak and tail of lilac finch are purple. Other leeches are usually called blue-banded finches.