El humedal es el hábitat de la cigüeña.

Spanish often uses the definite article much more than English, especially in general statements.

So El humedal es el hábitat de la cigüeña does not necessarily mean one specific wetland and one specific stork. It can mean something general, like:

• Wetlands are the habitat of the stork
• The wetland is the stork’s habitat / The wetland is the habitat of the stork

In Spanish, using el / la for a whole class or species is very common.

Because Spanish normally uses an article with nouns in this kind of structure.

• el hábitat de la cigüeña = the habitat of the stork / the stork’s habitat

Here la cigüeña can refer to the species in a general sense, not only one individual bird.

Leaving out the article and saying de cigüeña would sound unnatural here.

It can mean the stork as a species, so yes, it can be a generic singular.

Spanish often uses the singular with the definite article to talk about a whole category:

• La cigüeña = the stork / storks as a species
• El perro es un animal fiel = The dog is a loyal animal / Dogs are loyal animals

So in this sentence, la cigüeña is most naturally understood as a general reference.

Because this sentence expresses an identifying or defining relationship, not a temporary location or condition.

• es is used for identity, classification, definition, and essential characteristics
• está is used more for location, state, or condition

Here the idea is:

• The wetland is the habitat of the stork

That is a definition-like relationship, so ser is the natural choice.

If you said está, it would sound wrong in this context.

Humedal usually means wetland. It is a general environmental term for land that is saturated with water, either permanently or seasonally.

Depending on context, English translations might include:

• wetland
• marshland
• sometimes marsh in looser translation

But wetland is usually the best broad equivalent.

Hábitat is masculine, so it takes el:

• el hábitat

Its gender is lexical: you simply learn it as a masculine noun. The ending is not one of the most common Spanish noun endings, so it’s best to memorize it together with the article.

Plural:

• el hábitat
• los hábitats

The written accent shows where the stress goes:

• há-bi-tat

The stress is on the first syllable.

Without the accent mark, Spanish spelling rules would make you expect a different stress pattern. So the accent is there to show the correct pronunciation.

The diaeresis on ü tells you that the u is pronounced.

Compare:

• gue / gui normally: the u is silent
• güe / güi: the u is pronounced

So in cigüeña, you pronounce the u, roughly like gwe.

That is why it is written:

• ci-güe-ña

not as if the u were silent.

In standard Spain Spanish, it is approximately:

• thee-GWEN-ya

More precisely:

• ci sounds like th in think in most of Spain
• güe sounds like gwe
• ña sounds like nya

So:

• cigüeña ≈ thee-GWEN-ya

In many parts of Latin America, the first sound is s instead of th, so there it sounds more like see-GWEN-ya.

Ñ is a separate letter in Spanish, and it sounds like ny in:

• canyon
• lasagna (for many speakers)

So:

• cigüeña → the last part sounds like -nya

It is not the same as a plain n.

Yes. That version is perfectly grammatical and means essentially the same thing.

Compare:

• El humedal es el hábitat de la cigüeña
• El hábitat de la cigüeña es el humedal

The difference is mainly focus:

• El humedal... puts the spotlight on the wetland
• El hábitat de la cigüeña... puts the spotlight on the stork’s habitat

So both are correct; the choice depends on what you want to emphasize.

No. Only de + el contracts:

• de + el = del

But:

• de + la = de la
• de + los = de los
• de + las = de las

So de la cigüeña stays exactly as it is.

Not exactly, though they can be similar in some contexts.

• hábitat de la cigüeña = the stork’s habitat / habitat of the stork
• hábitat para la cigüeña = habitat for the stork

De shows possession or association.
Para shows purpose or suitability.

In this sentence, de la cigüeña is the most natural choice because it identifies whose habitat it is.