It depends what birds you are talking about. There are millions of birds.
Fed and generally looked-after well, and good general health permitting, birds do not stop breeding - menopause is unknown in birds
Mating actually refers to the allegiance of the birds...the partnership within the flock. Breeding is the sexual act and can be known as mounting.
aviculture
Jon D. McCracken has written: 'Breeding birds of Long Point, Lake Erie' -- subject(s): Birds, Breeding
An ornithologist would study the breeding sea birds on Antarctica's beaches during breeding season.
marine animals and birds
Susan Leigh Earnst has written: 'Population trends of breeding birds in Ohio' -- subject(s): Birds, Geographical distribution, Breeding, Maps
I will give you one good example. In recent years people have bought pythons and when they get too big they have released them into the swamp. Now, there are thousands of pythons in the swamps eating everything they can find. Their numbers are growing because they are breeding and the naturalist can’t keep up with the numbers that are breeding.
Birds typically start to sing in the springtime, as it is their breeding season.
It's a rookery
Migratory birds
The periodic round trips from breeding to non-breeding areas by birds is known as migration. Birds migrate to take advantage of better food sources, milder climates, and opportunities for breeding and raising young. Migration patterns can vary widely among bird species, with some traveling short distances and others undertaking long journeys spanning continents.