It could be either a hatchling (recently come out of the egg), a nestling (too young to leave the nest), or a chick (as for a hatchling and nestling).
A young sparrow is called a nestling. Nestlings are born without feathers and are dependent on their parents for food and care until they are able to fend for themselves.
Hen sparrow
it is called a chick or a host i am not sure well one of them
A hen sparrow
One of many species of small singing birds of the family Fringilligae, having conical bills, and feeding chiefly on seeds. Many sparrows are called also finches, and buntings. The common sparrow, or house sparrow, of Europe (Passer domesticus) is noted for its familiarity, its voracity, its attachment to its young, and its fecundity. See House sparrow, under House., Any one of several small singing birds somewhat resembling the true sparrows in form or habits, as the European hedge sparrow. See under Hedge.
chaTakA [चटका]= sparrow
The Adventures of Young Jack Sparrow - 2011 was released on: USA: 12 May 2011 (internet)
sam sparrow weeni boys
The cast of The Adventures of Young Jack Sparrow - 2011 includes: Zan Alda as Jack Sparrow Adam Allee as Mr. Bildger Ashley Rowlett as Vanessa the Mermaid
the boy sparrow has a black chest and is darker in colour the boy sparrow has a black chest and is darker in colour
A baby sparrow is called a "fledgling" once it has developed enough to leave the nest, but before it can fly well. Initially, when they are very young and still dependent on their parents, they are often referred to as "nestlings." These terms describe their stages of development as they grow from hatchlings to independent birds.
A sparrow is a bird, so it lays eggs rather than reproducing via live birth.