Nel cortile ci sono una gallina, un gallo e tre pulcini piccoli.

Because Italian usually combines in + il into the single form nel.

• in = in
• il cortile = the courtyard
• in il cortile becomes nel cortile

This kind of contraction is very common in Italian:

• in + il = nel
• in + lo = nello
• in + la = nella
• in + i = nei
• in + gli = negli
• in + le = nelle

So nel cortile simply means in the courtyard.

Here, ci sono means there are.

It is the standard Italian way to say that something exists or is present somewhere:

• C'è una gallina. = There is a hen.
• Ci sono tre pulcini. = There are three chicks.

In this sentence, Nel cortile ci sono... means In the courtyard there are...

In this sentence, ci is part of the fixed expression c'è / ci sono, which is used for there is / there are.

So you should think of:

• c'è = there is
• ci sono = there are

The word ci does not mean us here. In other contexts, ci can have other meanings, but in this structure it is best learned as part of the whole expression.

Because the sentence introduces more than one thing:

• a hen
• a rooster
• three small chicks

So the idea is plural overall, and standard Italian uses ci sono.

A useful rule for learners is:

• c'è
  • singular noun
• ci sono
  • plural noun or a list of multiple things

You may sometimes hear native speakers say c'è una gallina, un gallo e tre pulcini... in informal speech, because the first noun is singular. But for a learner, ci sono is the safer and more standard choice here.

Because Italian nouns have grammatical gender.

• gallina is feminine, so it takes una
• gallo is masculine, so it takes un

So:

• una gallina = a hen
• un gallo = a rooster

This is a basic agreement pattern in Italian:

• feminine singular noun → una
• masculine singular noun → un (or sometimes uno, depending on the next sound)

Because gallo begins with a normal consonant sound, so Italian uses un.

Uno is used before certain masculine singular nouns beginning with:

• s
  • consonant: uno studente
• z: uno zaino
• gn: uno gnomo
• ps: uno psicologo
• x: uno xilofono

But gallo starts with g + vowel, so the correct form is un gallo.

Because with numbers, Italian normally uses the number directly.

• tre pulcini = three chicks

You do not normally add an indefinite article before a counted noun phrase like this. That is the normal way to say it.

So the pattern is:

• un pulcino = a chick
• due pulcini = two chicks
• tre pulcini = three chicks

Because in Italian, descriptive adjectives often come after the noun.

So:

• pulcini piccoli = small chicks

This noun + adjective order is very common and neutral in Italian.

You can also sometimes find piccoli pulcini, but putting the adjective before the noun can sound more stylistic, expressive, or less neutral. For a learner, pulcini piccoli is a very straightforward pattern.

Because adjectives in Italian must agree with the noun they describe.

Here the noun is pulcini, which is:

• masculine
• plural

So the adjective must also be masculine plural:

• piccoli

Compare:

• un pulcino piccolo = a small chick
• due pulcini piccoli = two small chicks
• una gallina piccola = a small hen
• galline piccole = small hens

Because the sentence is introducing animals as part of a scene, not referring to specific ones already known to the listener.

So:

• una gallina = a hen
• un gallo = a rooster

This sounds natural when you are simply saying what is in the courtyard.

If you said la gallina or il gallo, it would suggest that the listener already knows which hen or rooster you mean.

Yes, Italian word order is fairly flexible.

The original sentence:

• Nel cortile ci sono una gallina, un gallo e tre pulcini piccoli.

starts with the place, which sets the scene first: In the courtyard...

You could also say:

• Ci sono una gallina, un gallo e tre pulcini piccoli nel cortile.

This is grammatical, but it puts the focus a little differently. The original version is very natural because it introduces the location first and then tells you what is there.

Because Italian, like English, uses commas to separate items in a list.

So:

• una gallina, un gallo e tre pulcini piccoli

means:

• a hen, a rooster, and three small chicks

The final e means and, just as in English.