The word survivors is a plural, common noun which is the direct object of the sentence. The direct object in this sentence is a subject complement, the object of a linking verb that renames the subject.
Archeoptyrix, Crocodiles and crocodile like creatures... Small mammals (which we evolved from), well... thats almost all known so far... although Archeoptyrix evolved into the modern birds, its still a survivor!
Yup. All the birds you see today are dinosaurs, therapods.
The birds are singing again!
A preposition at the beginning of a sentence is often used to indicate the relationship between the subject of the sentence and the rest of the sentence. When a preposition appears at the beginning of a sentence, it is followed by a noun or pronoun that serves as the object of the preposition. For example, "On the table, there is a book."
not worth consideration; unimportant:
The subject is "birds".
what are the abstract nouns in this sentence the birds live in their habitat with no fear
Birds migrate to the South for the winter time.
No chance. The dinosaurs died out hundreds of millions of years ago. Birds are descended from the survivors.
not worth consideration; unimportant:
birds - simple subject masses of birds - complete subject
The blue birds flew south for the winter.