birds - simple subject
masses of birds - complete subject
The subject is "birds".
The naming part of the sentence "I like to look at birds" is "birds." It is the subject of the sentence, telling us what the sentence is about.
cliff swallow
the birds are located off the cliffs of dover england
Bluebirds.
Penguins are birds that thrive in cold places.
"The birds that have the strongest talons are birds of prey such as falcons."The relative pronoun is 'that', which introduces the relative clause 'that have the strongest talons.' The relative clause gives information about its antecedent 'birds', the subject of the sentence.
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.
It was written as a war song.
in forests or cliffs, they usually use another old birds nest
Charles Dixon has written: 'Among the birds in northern shires' -- subject(s): Birds 'Jottings about birds' -- subject(s): Birds 'The migration of birds' -- subject(s): Birds, Migration 'Bird-life in a southern county' -- subject(s): Birds, Juvenile literature 'Lost and vanishing birds' -- subject(s): Extinct birds, Birds
John B. Dunning has written: 'CRC handbook of avian body masses' -- subject(s): Birds, Body size, Size, Tables